/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:15:20,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:15:20,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:15:20,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 06:15:20,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 06:15:20,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 06:15:20,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 06:15:20,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 06:15:20,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 06:15:20,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 06:15:20,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 06:15:20,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 06:15:20,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 06:15:20,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 06:15:20,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 06:15:20,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 06:15:20,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 06:15:20,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 06:15:20,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 06:15:21,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 06:15:21,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 06:15:21,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 06:15:21,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 06:15:21,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 06:15:21,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 06:15:21,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:15:21,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:15:21,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:15:21,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:15:21,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:15:21,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:15:21,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:15:21,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:15:21,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:15:21,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:15:21,358 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:15:21,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:15:21,359 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:15:21,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:15:21,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:15:21,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:15:21,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:15:21,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:15:21,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:15:21,359 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:15:21,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:15:21,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:15:21,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:15:21,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:15:21,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:15:21,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:15:21,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:15:21,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:15:21,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:15:21,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:15:21,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:15:21,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:15:21,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:15:21,361 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:15:21,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:15:21,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:15:21,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:15:21,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:15:21,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:15:21,703 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:15:21,705 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:15:21,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2021-06-05 06:15:21,803 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2021-06-05 06:15:21,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:15:21,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:15:21,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:15:21,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:15:21,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:15:21,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... [2021-06-05 06:15:21,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... [2021-06-05 06:15:21,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:15:21,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:15:21,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:15:21,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:15:21,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... [2021-06-05 06:15:21,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... [2021-06-05 06:15:21,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... [2021-06-05 06:15:21,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... [2021-06-05 06:15:21,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... [2021-06-05 06:15:21,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... [2021-06-05 06:15:21,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... [2021-06-05 06:15:21,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:15:21,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:15:21,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:15:21,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:15:21,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:15:21,980 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:15:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:15:21,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:15:21,980 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:15:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:15:21,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:15:21,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:15:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:15:21,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:15:21,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:15:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:15:21,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:15:21,983 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:15:22,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:15:22,123 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:15:22,124 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:15:22 BoogieIcfgContainer [2021-06-05 06:15:22,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:15:22,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:15:22,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:15:22,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:15:22,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:15:21" (1/2) ... [2021-06-05 06:15:22,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7464f729 and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:15:22, skipping insertion in model container [2021-06-05 06:15:22,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:15:22" (2/2) ... [2021-06-05 06:15:22,131 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2021-06-05 06:15:22,135 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:15:22,135 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:15:22,136 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:15:22,136 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:15:22,169 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 06:15:22,187 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 06:15:22,204 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:15:22,204 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:15:22,204 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:15:22,204 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:15:22,204 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:15:22,205 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:15:22,205 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:15:22,205 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:15:22,234 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-06-05 06:15:22,289 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:15:22,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:22,315 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:22,315 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:22,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:22,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2112338189, now seen corresponding path program 1 times [2021-06-05 06:15:22,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:22,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969405074] [2021-06-05 06:15:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:22,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969405074] [2021-06-05 06:15:22,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969405074] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:15:22,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:15:22,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:15:22,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637140863] [2021-06-05 06:15:22,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:15:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:22,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:15:22,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:15:22,542 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:22,598 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-06-05 06:15:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:15:22,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:15:22,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:22,621 INFO L225 Difference]: With dead ends: 298 [2021-06-05 06:15:22,621 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 06:15:22,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:15:22,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 06:15:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-05 06:15:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-06-05 06:15:22,696 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-06-05 06:15:22,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:22,702 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-06-05 06:15:22,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-06-05 06:15:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:22,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:22,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:22,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:15:22,711 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:22,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1377866598, now seen corresponding path program 1 times [2021-06-05 06:15:22,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:22,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763208485] [2021-06-05 06:15:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:22,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:22,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763208485] [2021-06-05 06:15:22,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763208485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:22,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347602701] [2021-06-05 06:15:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:15:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:23,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347602701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:23,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:23,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:15:23,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371954205] [2021-06-05 06:15:23,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:15:23,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:23,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:15:23,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:15:23,090 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:23,540 INFO L93 Difference]: Finished difference Result 1019 states and 2933 transitions. [2021-06-05 06:15:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:23,549 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 06:15:23,549 INFO L226 Difference]: Without dead ends: 1019 [2021-06-05 06:15:23,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:15:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-06-05 06:15:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 253. [2021-06-05 06:15:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2021-06-05 06:15:23,575 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2021-06-05 06:15:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:23,575 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2021-06-05 06:15:23,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2021-06-05 06:15:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:23,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:23,577 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:23,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 06:15:23,796 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1571767266, now seen corresponding path program 2 times [2021-06-05 06:15:23,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:23,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744074712] [2021-06-05 06:15:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:23,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:23,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744074712] [2021-06-05 06:15:23,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744074712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130271155] [2021-06-05 06:15:23,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:23,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:23,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:15:23,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:24,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130271155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:24,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:24,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:15:24,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955729816] [2021-06-05 06:15:24,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:15:24,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:24,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:15:24,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:15:24,021 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:24,336 INFO L93 Difference]: Finished difference Result 1035 states and 2973 transitions. [2021-06-05 06:15:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:15:24,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:24,342 INFO L225 Difference]: With dead ends: 1035 [2021-06-05 06:15:24,343 INFO L226 Difference]: Without dead ends: 1035 [2021-06-05 06:15:24,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:15:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-06-05 06:15:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 252. [2021-06-05 06:15:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2021-06-05 06:15:24,365 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2021-06-05 06:15:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:24,365 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2021-06-05 06:15:24,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2021-06-05 06:15:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:24,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:24,367 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:24,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:24,581 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:24,582 INFO L82 PathProgramCache]: Analyzing trace with hash -120635141, now seen corresponding path program 1 times [2021-06-05 06:15:24,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:24,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018277285] [2021-06-05 06:15:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:24,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:24,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018277285] [2021-06-05 06:15:24,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018277285] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:15:24,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:15:24,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:15:24,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243201696] [2021-06-05 06:15:24,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:15:24,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:24,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:15:24,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:15:24,620 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:24,688 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2021-06-05 06:15:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:15:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:24,692 INFO L225 Difference]: With dead ends: 483 [2021-06-05 06:15:24,692 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 06:15:24,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:15:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 06:15:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2021-06-05 06:15:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2021-06-05 06:15:24,705 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2021-06-05 06:15:24,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:24,705 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2021-06-05 06:15:24,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2021-06-05 06:15:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:24,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:24,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:24,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 06:15:24,707 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:24,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:24,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1682109104, now seen corresponding path program 1 times [2021-06-05 06:15:24,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:24,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779646871] [2021-06-05 06:15:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:24,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:24,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779646871] [2021-06-05 06:15:24,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779646871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:15:24,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:15:24,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:15:24,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922397348] [2021-06-05 06:15:24,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:15:24,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:24,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:15:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:15:24,749 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:24,831 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2021-06-05 06:15:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:15:24,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:24,835 INFO L225 Difference]: With dead ends: 539 [2021-06-05 06:15:24,835 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 06:15:24,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:15:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 06:15:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2021-06-05 06:15:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2021-06-05 06:15:24,869 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2021-06-05 06:15:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:24,869 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2021-06-05 06:15:24,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2021-06-05 06:15:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:24,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:24,872 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:24,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 06:15:24,872 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1479238087, now seen corresponding path program 2 times [2021-06-05 06:15:24,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:24,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818966827] [2021-06-05 06:15:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:24,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:24,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818966827] [2021-06-05 06:15:24,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818966827] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:15:24,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:15:24,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:15:24,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335022408] [2021-06-05 06:15:24,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:15:24,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:24,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:15:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:15:24,930 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:24,980 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2021-06-05 06:15:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:15:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:24,983 INFO L225 Difference]: With dead ends: 486 [2021-06-05 06:15:24,983 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 06:15:24,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:15:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 06:15:24,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2021-06-05 06:15:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2021-06-05 06:15:24,993 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2021-06-05 06:15:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:24,994 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2021-06-05 06:15:24,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2021-06-05 06:15:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:24,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:24,995 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:24,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 06:15:24,995 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash -314434059, now seen corresponding path program 3 times [2021-06-05 06:15:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:24,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186304954] [2021-06-05 06:15:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:25,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:25,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186304954] [2021-06-05 06:15:25,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186304954] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:15:25,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:15:25,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 06:15:25,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706512891] [2021-06-05 06:15:25,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:15:25,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:25,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:15:25,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:15:25,033 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:25,106 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2021-06-05 06:15:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:15:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:25,109 INFO L225 Difference]: With dead ends: 438 [2021-06-05 06:15:25,109 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 06:15:25,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:15:25,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 06:15:25,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-06-05 06:15:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-06-05 06:15:25,121 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-06-05 06:15:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:25,121 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-06-05 06:15:25,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-06-05 06:15:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:25,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:25,122 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:25,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 06:15:25,123 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1825817224, now seen corresponding path program 3 times [2021-06-05 06:15:25,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:25,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728509121] [2021-06-05 06:15:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:25,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728509121] [2021-06-05 06:15:25,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728509121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:25,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071984171] [2021-06-05 06:15:25,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:25,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:15:25,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:15:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:25,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071984171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:25,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:25,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:15:25,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132959840] [2021-06-05 06:15:25,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:15:25,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:25,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:15:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:15:25,308 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:25,587 INFO L93 Difference]: Finished difference Result 994 states and 2769 transitions. [2021-06-05 06:15:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:25,593 INFO L225 Difference]: With dead ends: 994 [2021-06-05 06:15:25,593 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 06:15:25,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:15:25,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 06:15:25,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 323. [2021-06-05 06:15:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-06-05 06:15:25,607 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-06-05 06:15:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:25,608 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-06-05 06:15:25,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-06-05 06:15:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:25,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:25,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:25,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:25,822 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:25,823 INFO L82 PathProgramCache]: Analyzing trace with hash 156862832, now seen corresponding path program 2 times [2021-06-05 06:15:25,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:25,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038125626] [2021-06-05 06:15:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:25,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:25,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038125626] [2021-06-05 06:15:25,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038125626] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:15:25,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:15:25,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 06:15:25,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848679624] [2021-06-05 06:15:25,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:15:25,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:25,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:15:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:15:25,867 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:26,009 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2021-06-05 06:15:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:15:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:26,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:26,013 INFO L225 Difference]: With dead ends: 466 [2021-06-05 06:15:26,013 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 06:15:26,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:15:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 06:15:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2021-06-05 06:15:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2021-06-05 06:15:26,029 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2021-06-05 06:15:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:26,029 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2021-06-05 06:15:26,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2021-06-05 06:15:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:26,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:26,030 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:26,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 06:15:26,030 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2015035522, now seen corresponding path program 4 times [2021-06-05 06:15:26,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:26,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722736884] [2021-06-05 06:15:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:26,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:26,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722736884] [2021-06-05 06:15:26,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722736884] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:15:26,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:15:26,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 06:15:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899494504] [2021-06-05 06:15:26,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:15:26,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:26,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:15:26,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:15:26,063 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:26,169 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2021-06-05 06:15:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:15:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:26,172 INFO L225 Difference]: With dead ends: 541 [2021-06-05 06:15:26,172 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 06:15:26,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:15:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 06:15:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2021-06-05 06:15:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2021-06-05 06:15:26,183 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2021-06-05 06:15:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:26,184 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2021-06-05 06:15:26,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2021-06-05 06:15:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:26,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:26,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:26,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 06:15:26,187 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:26,187 INFO L82 PathProgramCache]: Analyzing trace with hash -625514306, now seen corresponding path program 5 times [2021-06-05 06:15:26,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:26,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818186] [2021-06-05 06:15:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:26,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818186] [2021-06-05 06:15:26,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:26,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393982935] [2021-06-05 06:15:26,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:26,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:26,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:26,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:15:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:26,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393982935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:26,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:26,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 06:15:26,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548370139] [2021-06-05 06:15:26,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:15:26,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:26,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:15:26,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:15:26,353 INFO L87 Difference]: Start difference. First operand 276 states and 801 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:26,598 INFO L93 Difference]: Finished difference Result 760 states and 2180 transitions. [2021-06-05 06:15:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:26,598 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:26,602 INFO L225 Difference]: With dead ends: 760 [2021-06-05 06:15:26,602 INFO L226 Difference]: Without dead ends: 760 [2021-06-05 06:15:26,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-05 06:15:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 278. [2021-06-05 06:15:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2021-06-05 06:15:26,614 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2021-06-05 06:15:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:26,614 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2021-06-05 06:15:26,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2021-06-05 06:15:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:15:26,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:26,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:26,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:26,821 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1157135164, now seen corresponding path program 6 times [2021-06-05 06:15:26,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:26,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599166860] [2021-06-05 06:15:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:26,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:26,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599166860] [2021-06-05 06:15:26,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599166860] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:15:26,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:15:26,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 06:15:26,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174795002] [2021-06-05 06:15:26,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:15:26,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:15:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:15:26,856 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:26,925 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2021-06-05 06:15:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:15:26,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:15:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:26,929 INFO L225 Difference]: With dead ends: 429 [2021-06-05 06:15:26,929 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 06:15:26,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:15:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 06:15:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2021-06-05 06:15:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2021-06-05 06:15:26,937 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2021-06-05 06:15:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:26,937 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2021-06-05 06:15:26,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2021-06-05 06:15:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:15:26,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:26,938 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:26,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 06:15:26,938 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1959126516, now seen corresponding path program 1 times [2021-06-05 06:15:26,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:26,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536814761] [2021-06-05 06:15:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:27,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:27,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536814761] [2021-06-05 06:15:27,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536814761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:27,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85458281] [2021-06-05 06:15:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:15:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:27,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:15:27,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:27,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:27,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:27,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 06:15:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:27,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85458281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:27,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:27,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-06-05 06:15:27,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114520398] [2021-06-05 06:15:27,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:15:27,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:15:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:15:27,182 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:27,269 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2021-06-05 06:15:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:15:27,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:15:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:27,272 INFO L225 Difference]: With dead ends: 552 [2021-06-05 06:15:27,272 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 06:15:27,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:15:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 06:15:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2021-06-05 06:15:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2021-06-05 06:15:27,282 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2021-06-05 06:15:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:27,282 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2021-06-05 06:15:27,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2021-06-05 06:15:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:15:27,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:27,283 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:27,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 06:15:27,505 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 397652553, now seen corresponding path program 1 times [2021-06-05 06:15:27,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:27,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115180242] [2021-06-05 06:15:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:27,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:27,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115180242] [2021-06-05 06:15:27,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115180242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:27,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755439193] [2021-06-05 06:15:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:27,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:15:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:27,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:15:27,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:15:27,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:27,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:27,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:27,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-06-05 06:15:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:27,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755439193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:27,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:27,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-06-05 06:15:27,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894026481] [2021-06-05 06:15:27,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:15:27,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:27,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:15:27,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:15:27,965 INFO L87 Difference]: Start difference. First operand 372 states and 1106 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:28,413 INFO L93 Difference]: Finished difference Result 586 states and 1678 transitions. [2021-06-05 06:15:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:15:28,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:15:28,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:28,416 INFO L225 Difference]: With dead ends: 586 [2021-06-05 06:15:28,416 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 06:15:28,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:15:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 06:15:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 438. [2021-06-05 06:15:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2021-06-05 06:15:28,428 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2021-06-05 06:15:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:28,428 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2021-06-05 06:15:28,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:28,428 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2021-06-05 06:15:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:15:28,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:28,429 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:28,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:28,653 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:28,654 INFO L82 PathProgramCache]: Analyzing trace with hash 602801515, now seen corresponding path program 2 times [2021-06-05 06:15:28,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:28,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020924368] [2021-06-05 06:15:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:28,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:28,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020924368] [2021-06-05 06:15:28,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020924368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:28,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917982044] [2021-06-05 06:15:28,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:28,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:28,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:28,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:15:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:28,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:28,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 06:15:28,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:15:29,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:29,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:29,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 06:15:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:29,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917982044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:29,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:29,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-06-05 06:15:29,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035673471] [2021-06-05 06:15:29,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:15:29,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:29,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:15:29,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:15:29,065 INFO L87 Difference]: Start difference. First operand 438 states and 1291 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:29,560 INFO L93 Difference]: Finished difference Result 795 states and 2267 transitions. [2021-06-05 06:15:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:15:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:15:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:29,564 INFO L225 Difference]: With dead ends: 795 [2021-06-05 06:15:29,564 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 06:15:29,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:15:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 06:15:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 439. [2021-06-05 06:15:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2021-06-05 06:15:29,576 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2021-06-05 06:15:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:29,576 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2021-06-05 06:15:29,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2021-06-05 06:15:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:15:29,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:29,578 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:29,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:15:29,791 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:29,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1941464708, now seen corresponding path program 2 times [2021-06-05 06:15:29,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:29,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942556259] [2021-06-05 06:15:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:29,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:29,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942556259] [2021-06-05 06:15:29,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942556259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:29,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379604109] [2021-06-05 06:15:29,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:29,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:29,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:29,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:15:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:29,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:15:29,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:29,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:29,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:29,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 06:15:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:29,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379604109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:29,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:29,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 06:15:29,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016876291] [2021-06-05 06:15:29,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:15:29,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:29,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:15:29,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:15:29,997 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:30,073 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2021-06-05 06:15:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:15:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:15:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:30,076 INFO L225 Difference]: With dead ends: 645 [2021-06-05 06:15:30,076 INFO L226 Difference]: Without dead ends: 630 [2021-06-05 06:15:30,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:15:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-05 06:15:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2021-06-05 06:15:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2021-06-05 06:15:30,087 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2021-06-05 06:15:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:30,087 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2021-06-05 06:15:30,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2021-06-05 06:15:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:15:30,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:30,089 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:30,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 06:15:30,311 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash -745990585, now seen corresponding path program 3 times [2021-06-05 06:15:30,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:30,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772454061] [2021-06-05 06:15:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:30,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:30,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772454061] [2021-06-05 06:15:30,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772454061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:30,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051626208] [2021-06-05 06:15:30,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:30,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:15:30,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:30,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:15:30,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:30,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:15:30,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:30,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:30,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:30,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-05 06:15:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:30,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051626208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:30,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:30,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-06-05 06:15:30,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324313820] [2021-06-05 06:15:30,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:15:30,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:30,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:15:30,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:15:30,683 INFO L87 Difference]: Start difference. First operand 471 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:30,862 INFO L93 Difference]: Finished difference Result 592 states and 1679 transitions. [2021-06-05 06:15:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:15:30,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:15:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:30,864 INFO L225 Difference]: With dead ends: 592 [2021-06-05 06:15:30,864 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 06:15:30,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:15:30,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 06:15:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-06-05 06:15:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2021-06-05 06:15:30,878 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2021-06-05 06:15:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:30,878 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2021-06-05 06:15:30,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2021-06-05 06:15:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:15:30,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:30,880 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:31,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 06:15:31,093 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:31,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:31,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1226467769, now seen corresponding path program 4 times [2021-06-05 06:15:31,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:31,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505599267] [2021-06-05 06:15:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:31,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:31,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505599267] [2021-06-05 06:15:31,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505599267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:31,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860106756] [2021-06-05 06:15:31,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:31,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:31,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:31,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:15:31,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:31,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:15:31,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:15:31,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:31,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:31,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-05 06:15:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:31,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860106756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:31,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:31,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 06:15:31,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044390880] [2021-06-05 06:15:31,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:15:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:31,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:15:31,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:15:31,411 INFO L87 Difference]: Start difference. First operand 465 states and 1371 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:31,646 INFO L93 Difference]: Finished difference Result 683 states and 1988 transitions. [2021-06-05 06:15:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:15:31,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:15:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:31,648 INFO L225 Difference]: With dead ends: 683 [2021-06-05 06:15:31,648 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 06:15:31,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 06:15:31,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 469. [2021-06-05 06:15:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2021-06-05 06:15:31,660 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2021-06-05 06:15:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:31,660 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2021-06-05 06:15:31,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2021-06-05 06:15:31,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:15:31,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:31,661 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:31,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:31,883 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:31,884 INFO L82 PathProgramCache]: Analyzing trace with hash 572535559, now seen corresponding path program 5 times [2021-06-05 06:15:31,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:31,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657720746] [2021-06-05 06:15:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:32,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:32,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657720746] [2021-06-05 06:15:32,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657720746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:32,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045989506] [2021-06-05 06:15:32,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:32,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:32,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:15:32,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:32,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:32,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 06:15:32,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:15:32,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:15:32,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:15:32,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:28 [2021-06-05 06:15:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:32,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045989506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:32,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:32,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:15:32,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796375264] [2021-06-05 06:15:32,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:15:32,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:32,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:15:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:32,321 INFO L87 Difference]: Start difference. First operand 469 states and 1381 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:32,735 INFO L93 Difference]: Finished difference Result 759 states and 2222 transitions. [2021-06-05 06:15:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:15:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:15:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:32,739 INFO L225 Difference]: With dead ends: 759 [2021-06-05 06:15:32,739 INFO L226 Difference]: Without dead ends: 744 [2021-06-05 06:15:32,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 425.8ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:15:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-06-05 06:15:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 471. [2021-06-05 06:15:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2021-06-05 06:15:32,751 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2021-06-05 06:15:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:32,751 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2021-06-05 06:15:32,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2021-06-05 06:15:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:32,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:32,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:32,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:32,969 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:32,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:32,969 INFO L82 PathProgramCache]: Analyzing trace with hash 606500413, now seen corresponding path program 3 times [2021-06-05 06:15:32,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:32,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626435766] [2021-06-05 06:15:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:33,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626435766] [2021-06-05 06:15:33,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626435766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762140031] [2021-06-05 06:15:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:33,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:15:33,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:33,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:33,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762140031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:33,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:33,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:15:33,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438248762] [2021-06-05 06:15:33,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:15:33,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:33,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:15:33,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:15:33,153 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:33,973 INFO L93 Difference]: Finished difference Result 2301 states and 6530 transitions. [2021-06-05 06:15:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:15:33,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:33,982 INFO L225 Difference]: With dead ends: 2301 [2021-06-05 06:15:33,983 INFO L226 Difference]: Without dead ends: 2301 [2021-06-05 06:15:33,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=498, Invalid=1664, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:15:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-05 06:15:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 593. [2021-06-05 06:15:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.170608108108108) internal successors, (1877), 592 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1877 transitions. [2021-06-05 06:15:34,014 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1877 transitions. Word has length 27 [2021-06-05 06:15:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:34,014 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1877 transitions. [2021-06-05 06:15:34,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1877 transitions. [2021-06-05 06:15:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:34,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:34,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:34,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:34,238 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:34,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:34,238 INFO L82 PathProgramCache]: Analyzing trace with hash 412599745, now seen corresponding path program 4 times [2021-06-05 06:15:34,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:34,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015677104] [2021-06-05 06:15:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:34,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:34,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015677104] [2021-06-05 06:15:34,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015677104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:34,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825594752] [2021-06-05 06:15:34,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:34,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:34,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:34,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:34,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825594752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:34,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:34,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:15:34,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579679026] [2021-06-05 06:15:34,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:15:34,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:34,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:15:34,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:15:34,428 INFO L87 Difference]: Start difference. First operand 593 states and 1877 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:35,100 INFO L93 Difference]: Finished difference Result 2258 states and 6445 transitions. [2021-06-05 06:15:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:15:35,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:35,116 INFO L225 Difference]: With dead ends: 2258 [2021-06-05 06:15:35,116 INFO L226 Difference]: Without dead ends: 2258 [2021-06-05 06:15:35,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:15:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-06-05 06:15:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 577. [2021-06-05 06:15:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1354166666666665) internal successors, (1806), 576 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1806 transitions. [2021-06-05 06:15:35,141 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1806 transitions. Word has length 27 [2021-06-05 06:15:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:35,141 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1806 transitions. [2021-06-05 06:15:35,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1806 transitions. [2021-06-05 06:15:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:35,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:35,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:35,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 06:15:35,365 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:35,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1028264061, now seen corresponding path program 5 times [2021-06-05 06:15:35,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:35,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200812632] [2021-06-05 06:15:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:35,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:35,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200812632] [2021-06-05 06:15:35,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200812632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:35,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774698583] [2021-06-05 06:15:35,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:35,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:15:35,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:35,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:35,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774698583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:35,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:35,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:15:35,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396577723] [2021-06-05 06:15:35,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:15:35,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:35,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:15:35,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:15:35,562 INFO L87 Difference]: Start difference. First operand 577 states and 1806 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:35,961 INFO L93 Difference]: Finished difference Result 1609 states and 4647 transitions. [2021-06-05 06:15:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:15:35,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:35,966 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 06:15:35,966 INFO L226 Difference]: Without dead ends: 1609 [2021-06-05 06:15:35,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-06-05 06:15:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 585. [2021-06-05 06:15:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.125) internal successors, (1825), 584 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1825 transitions. [2021-06-05 06:15:35,985 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1825 transitions. Word has length 27 [2021-06-05 06:15:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:35,985 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1825 transitions. [2021-06-05 06:15:35,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1825 transitions. [2021-06-05 06:15:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:35,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:35,987 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:36,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:36,204 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:36,205 INFO L82 PathProgramCache]: Analyzing trace with hash -954973550, now seen corresponding path program 6 times [2021-06-05 06:15:36,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:36,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704239317] [2021-06-05 06:15:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:36,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:36,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704239317] [2021-06-05 06:15:36,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704239317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:36,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275111537] [2021-06-05 06:15:36,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:36,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:15:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:36,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275111537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:36,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:36,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:15:36,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339003435] [2021-06-05 06:15:36,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:15:36,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:36,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:15:36,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:15:36,393 INFO L87 Difference]: Start difference. First operand 585 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:36,770 INFO L93 Difference]: Finished difference Result 1639 states and 4720 transitions. [2021-06-05 06:15:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:15:36,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:36,775 INFO L225 Difference]: With dead ends: 1639 [2021-06-05 06:15:36,776 INFO L226 Difference]: Without dead ends: 1639 [2021-06-05 06:15:36,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:15:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-06-05 06:15:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 596. [2021-06-05 06:15:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.104201680672269) internal successors, (1847), 595 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1847 transitions. [2021-06-05 06:15:36,794 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1847 transitions. Word has length 27 [2021-06-05 06:15:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:36,794 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1847 transitions. [2021-06-05 06:15:36,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1847 transitions. [2021-06-05 06:15:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:36,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:36,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:37,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 06:15:37,019 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash -535240646, now seen corresponding path program 6 times [2021-06-05 06:15:37,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:37,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706807720] [2021-06-05 06:15:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:37,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:37,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706807720] [2021-06-05 06:15:37,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706807720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:37,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367348056] [2021-06-05 06:15:37,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:37,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:15:37,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:37,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:37,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:37,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367348056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:37,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:37,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:15:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413471308] [2021-06-05 06:15:37,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:15:37,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:37,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:15:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:15:37,146 INFO L87 Difference]: Start difference. First operand 596 states and 1847 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:37,272 INFO L93 Difference]: Finished difference Result 1374 states and 4109 transitions. [2021-06-05 06:15:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:15:37,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:37,274 INFO L225 Difference]: With dead ends: 1374 [2021-06-05 06:15:37,274 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 06:15:37,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:15:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 06:15:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 911. [2021-06-05 06:15:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.197802197802198) internal successors, (2910), 910 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2910 transitions. [2021-06-05 06:15:37,294 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2910 transitions. Word has length 27 [2021-06-05 06:15:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:37,294 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 2910 transitions. [2021-06-05 06:15:37,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2910 transitions. [2021-06-05 06:15:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:37,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:37,296 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:37,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:15:37,521 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1446478511, now seen corresponding path program 1 times [2021-06-05 06:15:37,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:37,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561922591] [2021-06-05 06:15:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:37,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:37,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561922591] [2021-06-05 06:15:37,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561922591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:37,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888921880] [2021-06-05 06:15:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:37,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:37,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888921880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:37,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:37,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 06:15:37,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089801684] [2021-06-05 06:15:37,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:37,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:37,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:37,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:37,664 INFO L87 Difference]: Start difference. First operand 911 states and 2910 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:37,905 INFO L93 Difference]: Finished difference Result 1491 states and 4323 transitions. [2021-06-05 06:15:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:37,907 INFO L225 Difference]: With dead ends: 1491 [2021-06-05 06:15:37,907 INFO L226 Difference]: Without dead ends: 1465 [2021-06-05 06:15:37,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:15:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-05 06:15:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 969. [2021-06-05 06:15:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.145661157024793) internal successors, (3045), 968 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3045 transitions. [2021-06-05 06:15:37,928 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3045 transitions. Word has length 27 [2021-06-05 06:15:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:37,929 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3045 transitions. [2021-06-05 06:15:37,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3045 transitions. [2021-06-05 06:15:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:37,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:37,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:38,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 06:15:38,154 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1928537542, now seen corresponding path program 7 times [2021-06-05 06:15:38,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:38,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733435453] [2021-06-05 06:15:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:38,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:38,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733435453] [2021-06-05 06:15:38,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733435453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:38,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311304646] [2021-06-05 06:15:38,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:38,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:38,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311304646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:38,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:38,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:15:38,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015482861] [2021-06-05 06:15:38,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:15:38,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:38,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:15:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:15:38,316 INFO L87 Difference]: Start difference. First operand 969 states and 3045 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:38,491 INFO L93 Difference]: Finished difference Result 1664 states and 5013 transitions. [2021-06-05 06:15:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:15:38,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:38,494 INFO L225 Difference]: With dead ends: 1664 [2021-06-05 06:15:38,494 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 06:15:38,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:15:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 06:15:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1122. [2021-06-05 06:15:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.1793041926851027) internal successors, (3564), 1121 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:38,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3564 transitions. [2021-06-05 06:15:38,520 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3564 transitions. Word has length 27 [2021-06-05 06:15:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:38,520 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3564 transitions. [2021-06-05 06:15:38,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3564 transitions. [2021-06-05 06:15:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:38,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:38,523 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:38,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:15:38,746 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash -337091691, now seen corresponding path program 2 times [2021-06-05 06:15:38,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:38,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589826005] [2021-06-05 06:15:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:38,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:38,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589826005] [2021-06-05 06:15:38,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589826005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:38,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647508612] [2021-06-05 06:15:38,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:38,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:38,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:38,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647508612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:38,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:38,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 06:15:38,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952099296] [2021-06-05 06:15:38,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:38,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:38,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:38,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:38,892 INFO L87 Difference]: Start difference. First operand 1122 states and 3564 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:39,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:39,139 INFO L93 Difference]: Finished difference Result 1812 states and 5305 transitions. [2021-06-05 06:15:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:39,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:39,143 INFO L225 Difference]: With dead ends: 1812 [2021-06-05 06:15:39,143 INFO L226 Difference]: Without dead ends: 1790 [2021-06-05 06:15:39,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:15:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-06-05 06:15:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1115. [2021-06-05 06:15:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 3.1867145421903054) internal successors, (3550), 1114 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3550 transitions. [2021-06-05 06:15:39,169 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3550 transitions. Word has length 27 [2021-06-05 06:15:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:39,169 INFO L482 AbstractCegarLoop]: Abstraction has 1115 states and 3550 transitions. [2021-06-05 06:15:39,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3550 transitions. [2021-06-05 06:15:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:39,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:39,171 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:39,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:39,385 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:39,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:39,385 INFO L82 PathProgramCache]: Analyzing trace with hash 570714739, now seen corresponding path program 3 times [2021-06-05 06:15:39,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:39,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991796973] [2021-06-05 06:15:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:39,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991796973] [2021-06-05 06:15:39,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991796973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213950316] [2021-06-05 06:15:39,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:39,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:15:39,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:39,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:39,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:39,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213950316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:39,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:39,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:15:39,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600858626] [2021-06-05 06:15:39,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:15:39,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:39,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:15:39,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:15:39,533 INFO L87 Difference]: Start difference. First operand 1115 states and 3550 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:39,803 INFO L93 Difference]: Finished difference Result 2086 states and 6158 transitions. [2021-06-05 06:15:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:39,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:39,809 INFO L225 Difference]: With dead ends: 2086 [2021-06-05 06:15:39,809 INFO L226 Difference]: Without dead ends: 2060 [2021-06-05 06:15:39,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:15:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-06-05 06:15:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1141. [2021-06-05 06:15:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.207894736842105) internal successors, (3657), 1140 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3657 transitions. [2021-06-05 06:15:39,841 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3657 transitions. Word has length 27 [2021-06-05 06:15:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:39,841 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3657 transitions. [2021-06-05 06:15:39,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3657 transitions. [2021-06-05 06:15:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:39,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:39,844 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:40,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 06:15:40,062 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:40,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2074608542, now seen corresponding path program 7 times [2021-06-05 06:15:40,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:40,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240985571] [2021-06-05 06:15:40,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:40,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:40,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240985571] [2021-06-05 06:15:40,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240985571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:40,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573121797] [2021-06-05 06:15:40,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:40,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:40,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573121797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:40,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:40,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 06:15:40,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767341956] [2021-06-05 06:15:40,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:15:40,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:40,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:15:40,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:15:40,200 INFO L87 Difference]: Start difference. First operand 1141 states and 3657 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:40,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:40,356 INFO L93 Difference]: Finished difference Result 1777 states and 5270 transitions. [2021-06-05 06:15:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:15:40,357 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:40,360 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 06:15:40,360 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 06:15:40,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 06:15:40,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1147. [2021-06-05 06:15:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.1928446771378707) internal successors, (3659), 1146 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3659 transitions. [2021-06-05 06:15:40,386 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3659 transitions. Word has length 27 [2021-06-05 06:15:40,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:40,387 INFO L482 AbstractCegarLoop]: Abstraction has 1147 states and 3659 transitions. [2021-06-05 06:15:40,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3659 transitions. [2021-06-05 06:15:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:40,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:40,389 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:40,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 06:15:40,605 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1728029405, now seen corresponding path program 8 times [2021-06-05 06:15:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:40,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314763791] [2021-06-05 06:15:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:40,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:40,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314763791] [2021-06-05 06:15:40,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314763791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:40,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788701217] [2021-06-05 06:15:40,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:40,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:40,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:40,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:40,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:40,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788701217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:40,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:40,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 06:15:40,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295578627] [2021-06-05 06:15:40,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:40,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:40,747 INFO L87 Difference]: Start difference. First operand 1147 states and 3659 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:41,334 INFO L93 Difference]: Finished difference Result 4076 states and 11819 transitions. [2021-06-05 06:15:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:15:41,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:41,340 INFO L225 Difference]: With dead ends: 4076 [2021-06-05 06:15:41,340 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 06:15:41,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=362, Invalid=1120, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:15:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 06:15:41,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 1262. [2021-06-05 06:15:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.274385408406027) internal successors, (4129), 1261 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4129 transitions. [2021-06-05 06:15:41,384 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4129 transitions. Word has length 27 [2021-06-05 06:15:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:41,384 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4129 transitions. [2021-06-05 06:15:41,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4129 transitions. [2021-06-05 06:15:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:41,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:41,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:41,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:41,589 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:41,589 INFO L82 PathProgramCache]: Analyzing trace with hash -584257835, now seen corresponding path program 4 times [2021-06-05 06:15:41,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:41,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700000773] [2021-06-05 06:15:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:41,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:41,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700000773] [2021-06-05 06:15:41,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700000773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:41,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115426817] [2021-06-05 06:15:41,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:41,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:41,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:41,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:41,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:41,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115426817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:41,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:41,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:15:41,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695478672] [2021-06-05 06:15:41,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:15:41,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:15:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:15:41,717 INFO L87 Difference]: Start difference. First operand 1262 states and 4129 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:41,972 INFO L93 Difference]: Finished difference Result 2048 states and 6254 transitions. [2021-06-05 06:15:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:15:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:41,975 INFO L225 Difference]: With dead ends: 2048 [2021-06-05 06:15:41,975 INFO L226 Difference]: Without dead ends: 2048 [2021-06-05 06:15:41,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:15:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-06-05 06:15:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1280. [2021-06-05 06:15:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.2752150117279126) internal successors, (4189), 1279 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4189 transitions. [2021-06-05 06:15:42,002 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4189 transitions. Word has length 27 [2021-06-05 06:15:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:42,002 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 4189 transitions. [2021-06-05 06:15:42,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4189 transitions. [2021-06-05 06:15:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:42,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:42,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:42,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 06:15:42,223 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1538811107, now seen corresponding path program 9 times [2021-06-05 06:15:42,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:42,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037310064] [2021-06-05 06:15:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:42,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:42,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037310064] [2021-06-05 06:15:42,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037310064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:42,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219458173] [2021-06-05 06:15:42,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:42,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:15:42,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:42,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:42,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:42,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219458173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:42,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:42,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 06:15:42,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978878427] [2021-06-05 06:15:42,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:42,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:42,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:42,349 INFO L87 Difference]: Start difference. First operand 1280 states and 4189 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:43,035 INFO L93 Difference]: Finished difference Result 3885 states and 11397 transitions. [2021-06-05 06:15:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:15:43,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:43,040 INFO L225 Difference]: With dead ends: 3885 [2021-06-05 06:15:43,040 INFO L226 Difference]: Without dead ends: 3877 [2021-06-05 06:15:43,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:15:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2021-06-05 06:15:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 1292. [2021-06-05 06:15:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.260263361735089) internal successors, (4209), 1291 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4209 transitions. [2021-06-05 06:15:43,079 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4209 transitions. Word has length 27 [2021-06-05 06:15:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:43,079 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4209 transitions. [2021-06-05 06:15:43,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4209 transitions. [2021-06-05 06:15:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:43,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:43,081 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:43,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:43,297 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:43,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:43,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1366634973, now seen corresponding path program 10 times [2021-06-05 06:15:43,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:43,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489238129] [2021-06-05 06:15:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:43,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:43,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489238129] [2021-06-05 06:15:43,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489238129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:43,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198345099] [2021-06-05 06:15:43,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:43,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:43,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:43,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:43,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:43,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198345099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:43,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:43,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 06:15:43,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631557707] [2021-06-05 06:15:43,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:15:43,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:43,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:15:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:15:43,437 INFO L87 Difference]: Start difference. First operand 1292 states and 4209 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:44,121 INFO L93 Difference]: Finished difference Result 3967 states and 11593 transitions. [2021-06-05 06:15:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:15:44,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:44,128 INFO L225 Difference]: With dead ends: 3967 [2021-06-05 06:15:44,128 INFO L226 Difference]: Without dead ends: 3967 [2021-06-05 06:15:44,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:15:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-06-05 06:15:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 1392. [2021-06-05 06:15:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.250179726815241) internal successors, (4521), 1391 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4521 transitions. [2021-06-05 06:15:44,170 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4521 transitions. Word has length 27 [2021-06-05 06:15:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:44,170 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4521 transitions. [2021-06-05 06:15:44,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4521 transitions. [2021-06-05 06:15:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:44,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:44,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:44,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 06:15:44,389 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:44,389 INFO L82 PathProgramCache]: Analyzing trace with hash 416014497, now seen corresponding path program 11 times [2021-06-05 06:15:44,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:44,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102601209] [2021-06-05 06:15:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:44,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:44,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102601209] [2021-06-05 06:15:44,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102601209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:44,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746821593] [2021-06-05 06:15:44,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:44,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:15:44,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:44,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:44,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:44,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746821593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:44,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:44,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 06:15:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826041554] [2021-06-05 06:15:44,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:15:44,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:15:44,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:15:44,535 INFO L87 Difference]: Start difference. First operand 1392 states and 4521 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:45,134 INFO L93 Difference]: Finished difference Result 3712 states and 10972 transitions. [2021-06-05 06:15:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:15:45,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:45,139 INFO L225 Difference]: With dead ends: 3712 [2021-06-05 06:15:45,139 INFO L226 Difference]: Without dead ends: 3704 [2021-06-05 06:15:45,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:15:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-05 06:15:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 1392. [2021-06-05 06:15:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.2473040977713876) internal successors, (4517), 1391 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4517 transitions. [2021-06-05 06:15:45,194 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4517 transitions. Word has length 27 [2021-06-05 06:15:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:45,194 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4517 transitions. [2021-06-05 06:15:45,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4517 transitions. [2021-06-05 06:15:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:45,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:45,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:45,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 06:15:45,408 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1631157469, now seen corresponding path program 12 times [2021-06-05 06:15:45,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:45,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448307970] [2021-06-05 06:15:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:45,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:45,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448307970] [2021-06-05 06:15:45,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448307970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:45,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035845286] [2021-06-05 06:15:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:45,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:15:45,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:45,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:45,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:45,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035845286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:45,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:45,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:15:45,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12123248] [2021-06-05 06:15:45,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:15:45,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:15:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:15:45,544 INFO L87 Difference]: Start difference. First operand 1392 states and 4517 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:45,942 INFO L93 Difference]: Finished difference Result 3014 states and 9077 transitions. [2021-06-05 06:15:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:15:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:45,948 INFO L225 Difference]: With dead ends: 3014 [2021-06-05 06:15:45,948 INFO L226 Difference]: Without dead ends: 3014 [2021-06-05 06:15:45,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:15:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2021-06-05 06:15:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 1410. [2021-06-05 06:15:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.2462739531582683) internal successors, (4574), 1409 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4574 transitions. [2021-06-05 06:15:45,985 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4574 transitions. Word has length 27 [2021-06-05 06:15:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:45,985 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4574 transitions. [2021-06-05 06:15:45,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4574 transitions. [2021-06-05 06:15:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:45,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:45,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:46,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 06:15:46,211 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:46,211 INFO L82 PathProgramCache]: Analyzing trace with hash 733023956, now seen corresponding path program 8 times [2021-06-05 06:15:46,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:46,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76935182] [2021-06-05 06:15:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:46,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:46,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76935182] [2021-06-05 06:15:46,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76935182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:46,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745580883] [2021-06-05 06:15:46,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:46,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:46,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:46,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:46,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:46,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745580883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:46,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:46,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:15:46,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055446949] [2021-06-05 06:15:46,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:46,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:46,335 INFO L87 Difference]: Start difference. First operand 1410 states and 4574 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:46,641 INFO L93 Difference]: Finished difference Result 3028 states and 9102 transitions. [2021-06-05 06:15:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:15:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:46,645 INFO L225 Difference]: With dead ends: 3028 [2021-06-05 06:15:46,645 INFO L226 Difference]: Without dead ends: 3028 [2021-06-05 06:15:46,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:15:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-06-05 06:15:46,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1426. [2021-06-05 06:15:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.2435087719298243) internal successors, (4622), 1425 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4622 transitions. [2021-06-05 06:15:46,677 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4622 transitions. Word has length 27 [2021-06-05 06:15:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:46,677 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4622 transitions. [2021-06-05 06:15:46,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4622 transitions. [2021-06-05 06:15:46,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:46,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:46,680 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:46,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 06:15:46,901 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash 645299584, now seen corresponding path program 9 times [2021-06-05 06:15:46,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:46,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864258023] [2021-06-05 06:15:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:46,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:46,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864258023] [2021-06-05 06:15:46,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864258023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:46,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174569159] [2021-06-05 06:15:46,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:46,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:15:46,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:46,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:46,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:47,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174569159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:47,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:47,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:15:47,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694245284] [2021-06-05 06:15:47,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:47,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:47,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:47,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:47,040 INFO L87 Difference]: Start difference. First operand 1426 states and 4622 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:47,503 INFO L93 Difference]: Finished difference Result 3515 states and 10389 transitions. [2021-06-05 06:15:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:15:47,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:47,508 INFO L225 Difference]: With dead ends: 3515 [2021-06-05 06:15:47,508 INFO L226 Difference]: Without dead ends: 3515 [2021-06-05 06:15:47,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:15:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-06-05 06:15:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 1494. [2021-06-05 06:15:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.2391158740790353) internal successors, (4836), 1493 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 4836 transitions. [2021-06-05 06:15:47,547 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 4836 transitions. Word has length 27 [2021-06-05 06:15:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:47,547 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 4836 transitions. [2021-06-05 06:15:47,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 4836 transitions. [2021-06-05 06:15:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:47,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:47,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:47,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 06:15:47,765 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 317969308, now seen corresponding path program 10 times [2021-06-05 06:15:47,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:47,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548787212] [2021-06-05 06:15:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:47,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:47,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548787212] [2021-06-05 06:15:47,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548787212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:47,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114323657] [2021-06-05 06:15:47,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:47,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:47,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:47,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:47,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114323657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:47,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:47,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:15:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132451619] [2021-06-05 06:15:47,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:15:47,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:47,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:15:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:15:47,913 INFO L87 Difference]: Start difference. First operand 1494 states and 4836 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:48,241 INFO L93 Difference]: Finished difference Result 3812 states and 11703 transitions. [2021-06-05 06:15:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:48,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:48,248 INFO L225 Difference]: With dead ends: 3812 [2021-06-05 06:15:48,248 INFO L226 Difference]: Without dead ends: 3805 [2021-06-05 06:15:48,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-05 06:15:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 2152. [2021-06-05 06:15:48,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3421664342166433) internal successors, (7189), 2151 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7189 transitions. [2021-06-05 06:15:48,301 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7189 transitions. Word has length 27 [2021-06-05 06:15:48,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:48,301 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 7189 transitions. [2021-06-05 06:15:48,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7189 transitions. [2021-06-05 06:15:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:48,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:48,305 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:48,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:48,528 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:48,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1267266998, now seen corresponding path program 11 times [2021-06-05 06:15:48,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:48,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774284261] [2021-06-05 06:15:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:48,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:48,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774284261] [2021-06-05 06:15:48,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774284261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:48,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711034349] [2021-06-05 06:15:48,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:48,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:15:48,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:48,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:48,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711034349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:48,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:48,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:15:48,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736080785] [2021-06-05 06:15:48,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:15:48,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:15:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:15:48,681 INFO L87 Difference]: Start difference. First operand 2152 states and 7189 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:48,996 INFO L93 Difference]: Finished difference Result 3889 states and 11952 transitions. [2021-06-05 06:15:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:15:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:49,000 INFO L225 Difference]: With dead ends: 3889 [2021-06-05 06:15:49,000 INFO L226 Difference]: Without dead ends: 3889 [2021-06-05 06:15:49,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:15:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-06-05 06:15:49,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 2116. [2021-06-05 06:15:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 3.315839243498818) internal successors, (7013), 2115 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7013 transitions. [2021-06-05 06:15:49,037 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7013 transitions. Word has length 27 [2021-06-05 06:15:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:49,037 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 7013 transitions. [2021-06-05 06:15:49,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7013 transitions. [2021-06-05 06:15:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:49,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:49,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:49,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:49,263 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:49,263 INFO L82 PathProgramCache]: Analyzing trace with hash -904631356, now seen corresponding path program 12 times [2021-06-05 06:15:49,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:49,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992237912] [2021-06-05 06:15:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:49,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:49,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992237912] [2021-06-05 06:15:49,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992237912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:49,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284647503] [2021-06-05 06:15:49,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:49,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:15:49,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:49,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:49,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:49,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284647503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:49,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:49,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:15:49,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83965610] [2021-06-05 06:15:49,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:49,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:49,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:49,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:49,411 INFO L87 Difference]: Start difference. First operand 2116 states and 7013 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:49,800 INFO L93 Difference]: Finished difference Result 3915 states and 12164 transitions. [2021-06-05 06:15:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:15:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:49,805 INFO L225 Difference]: With dead ends: 3915 [2021-06-05 06:15:49,805 INFO L226 Difference]: Without dead ends: 3911 [2021-06-05 06:15:49,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:15:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-06-05 06:15:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 2114. [2021-06-05 06:15:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 3.313771888310459) internal successors, (7002), 2113 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 7002 transitions. [2021-06-05 06:15:49,841 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 7002 transitions. Word has length 27 [2021-06-05 06:15:49,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:49,841 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 7002 transitions. [2021-06-05 06:15:49,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 7002 transitions. [2021-06-05 06:15:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:49,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:49,845 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:50,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 06:15:50,065 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:50,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:50,065 INFO L82 PathProgramCache]: Analyzing trace with hash 741045571, now seen corresponding path program 5 times [2021-06-05 06:15:50,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:50,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067105416] [2021-06-05 06:15:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:50,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067105416] [2021-06-05 06:15:50,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067105416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634045422] [2021-06-05 06:15:50,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:50,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:50,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:50,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:50,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634045422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:50,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:50,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 06:15:50,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641176763] [2021-06-05 06:15:50,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:50,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:50,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:50,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:50,183 INFO L87 Difference]: Start difference. First operand 2114 states and 7002 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:50,488 INFO L93 Difference]: Finished difference Result 3295 states and 10178 transitions. [2021-06-05 06:15:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:15:50,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:50,492 INFO L225 Difference]: With dead ends: 3295 [2021-06-05 06:15:50,492 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 06:15:50,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:15:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 06:15:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2176. [2021-06-05 06:15:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.331494252873563) internal successors, (7246), 2175 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7246 transitions. [2021-06-05 06:15:50,523 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7246 transitions. Word has length 27 [2021-06-05 06:15:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:50,523 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7246 transitions. [2021-06-05 06:15:50,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7246 transitions. [2021-06-05 06:15:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:50,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:50,527 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:50,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:50,727 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:50,727 INFO L82 PathProgramCache]: Analyzing trace with hash 989889791, now seen corresponding path program 6 times [2021-06-05 06:15:50,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:50,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850447004] [2021-06-05 06:15:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:50,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:50,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850447004] [2021-06-05 06:15:50,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850447004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:50,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476433757] [2021-06-05 06:15:50,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:50,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:15:50,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:50,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:50,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476433757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:50,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:50,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 06:15:50,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277544845] [2021-06-05 06:15:50,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:50,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:50,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:50,842 INFO L87 Difference]: Start difference. First operand 2176 states and 7246 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:51,149 INFO L93 Difference]: Finished difference Result 3360 states and 10395 transitions. [2021-06-05 06:15:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:15:51,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:51,155 INFO L225 Difference]: With dead ends: 3360 [2021-06-05 06:15:51,155 INFO L226 Difference]: Without dead ends: 3360 [2021-06-05 06:15:51,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:15:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-06-05 06:15:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2143. [2021-06-05 06:15:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.316526610644258) internal successors, (7104), 2142 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7104 transitions. [2021-06-05 06:15:51,190 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7104 transitions. Word has length 27 [2021-06-05 06:15:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:51,190 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7104 transitions. [2021-06-05 06:15:51,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7104 transitions. [2021-06-05 06:15:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:51,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:51,193 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:51,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 06:15:51,394 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1160574596, now seen corresponding path program 13 times [2021-06-05 06:15:51,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:51,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601110530] [2021-06-05 06:15:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:51,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:51,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601110530] [2021-06-05 06:15:51,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601110530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:51,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025448032] [2021-06-05 06:15:51,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:51,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025448032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:51,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:51,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:15:51,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319738804] [2021-06-05 06:15:51,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:15:51,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:51,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:15:51,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:15:51,543 INFO L87 Difference]: Start difference. First operand 2143 states and 7104 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:52,319 INFO L93 Difference]: Finished difference Result 6236 states and 18781 transitions. [2021-06-05 06:15:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:15:52,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:52,329 INFO L225 Difference]: With dead ends: 6236 [2021-06-05 06:15:52,329 INFO L226 Difference]: Without dead ends: 6236 [2021-06-05 06:15:52,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:15:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-05 06:15:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 2154. [2021-06-05 06:15:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2153 states have (on average 3.32559219693451) internal successors, (7160), 2153 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 7160 transitions. [2021-06-05 06:15:52,385 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 7160 transitions. Word has length 27 [2021-06-05 06:15:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:52,385 INFO L482 AbstractCegarLoop]: Abstraction has 2154 states and 7160 transitions. [2021-06-05 06:15:52,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 7160 transitions. [2021-06-05 06:15:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:52,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:52,389 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:52,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:52,589 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:52,590 INFO L82 PathProgramCache]: Analyzing trace with hash 966673928, now seen corresponding path program 14 times [2021-06-05 06:15:52,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:52,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485762710] [2021-06-05 06:15:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:52,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:52,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485762710] [2021-06-05 06:15:52,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485762710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:52,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434746209] [2021-06-05 06:15:52,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:52,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:52,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:52,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:52,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434746209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:52,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:52,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:15:52,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043438118] [2021-06-05 06:15:52,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:15:52,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:52,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:15:52,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:15:52,738 INFO L87 Difference]: Start difference. First operand 2154 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:53,511 INFO L93 Difference]: Finished difference Result 6112 states and 18481 transitions. [2021-06-05 06:15:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:15:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:53,520 INFO L225 Difference]: With dead ends: 6112 [2021-06-05 06:15:53,520 INFO L226 Difference]: Without dead ends: 6112 [2021-06-05 06:15:53,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:15:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-06-05 06:15:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 2135. [2021-06-05 06:15:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.3130271790065606) internal successors, (7070), 2134 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7070 transitions. [2021-06-05 06:15:53,564 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7070 transitions. Word has length 27 [2021-06-05 06:15:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:53,564 INFO L482 AbstractCegarLoop]: Abstraction has 2135 states and 7070 transitions. [2021-06-05 06:15:53,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7070 transitions. [2021-06-05 06:15:53,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:53,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:53,567 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:53,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 06:15:53,768 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1779667311, now seen corresponding path program 7 times [2021-06-05 06:15:53,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:53,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433382872] [2021-06-05 06:15:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:53,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:53,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433382872] [2021-06-05 06:15:53,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433382872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:53,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853249519] [2021-06-05 06:15:53,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:53,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:53,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:53,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853249519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:53,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:53,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:15:53,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675332751] [2021-06-05 06:15:53,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:15:53,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:15:53,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:15:53,909 INFO L87 Difference]: Start difference. First operand 2135 states and 7070 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:54,153 INFO L93 Difference]: Finished difference Result 3444 states and 10974 transitions. [2021-06-05 06:15:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:15:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:54,160 INFO L225 Difference]: With dead ends: 3444 [2021-06-05 06:15:54,160 INFO L226 Difference]: Without dead ends: 3418 [2021-06-05 06:15:54,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-06-05 06:15:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2593. [2021-06-05 06:15:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 3.3599537037037037) internal successors, (8709), 2592 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 8709 transitions. [2021-06-05 06:15:54,210 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 8709 transitions. Word has length 27 [2021-06-05 06:15:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:54,210 INFO L482 AbstractCegarLoop]: Abstraction has 2593 states and 8709 transitions. [2021-06-05 06:15:54,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 8709 transitions. [2021-06-05 06:15:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:54,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:54,214 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:54,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 06:15:54,414 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:54,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1360327411, now seen corresponding path program 8 times [2021-06-05 06:15:54,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:54,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10740960] [2021-06-05 06:15:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:54,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:54,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10740960] [2021-06-05 06:15:54,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10740960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:54,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245706816] [2021-06-05 06:15:54,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:54,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:54,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245706816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:54,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:54,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:15:54,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002142836] [2021-06-05 06:15:54,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:15:54,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:54,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:15:54,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:15:54,548 INFO L87 Difference]: Start difference. First operand 2593 states and 8709 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:54,713 INFO L93 Difference]: Finished difference Result 3554 states and 11351 transitions. [2021-06-05 06:15:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:15:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:54,719 INFO L225 Difference]: With dead ends: 3554 [2021-06-05 06:15:54,719 INFO L226 Difference]: Without dead ends: 3554 [2021-06-05 06:15:54,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-06-05 06:15:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 2611. [2021-06-05 06:15:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.3555555555555556) internal successors, (8758), 2610 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 8758 transitions. [2021-06-05 06:15:54,774 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 8758 transitions. Word has length 27 [2021-06-05 06:15:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:54,774 INFO L482 AbstractCegarLoop]: Abstraction has 2611 states and 8758 transitions. [2021-06-05 06:15:54,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 8758 transitions. [2021-06-05 06:15:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:54,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:54,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:54,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 06:15:54,979 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:54,979 INFO L82 PathProgramCache]: Analyzing trace with hash -260473223, now seen corresponding path program 13 times [2021-06-05 06:15:54,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:54,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028127361] [2021-06-05 06:15:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:55,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:55,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028127361] [2021-06-05 06:15:55,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028127361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:55,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526948253] [2021-06-05 06:15:55,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:55,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526948253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:55,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:55,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 06:15:55,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967933515] [2021-06-05 06:15:55,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:15:55,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:55,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:15:55,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:15:55,144 INFO L87 Difference]: Start difference. First operand 2611 states and 8758 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:55,716 INFO L93 Difference]: Finished difference Result 8012 states and 25327 transitions. [2021-06-05 06:15:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:15:55,717 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:55,728 INFO L225 Difference]: With dead ends: 8012 [2021-06-05 06:15:55,728 INFO L226 Difference]: Without dead ends: 8012 [2021-06-05 06:15:55,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:15:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-06-05 06:15:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3370. [2021-06-05 06:15:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 3.4579994063520334) internal successors, (11650), 3369 states have internal predecessors, (11650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 11650 transitions. [2021-06-05 06:15:55,819 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 11650 transitions. Word has length 27 [2021-06-05 06:15:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:55,819 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 11650 transitions. [2021-06-05 06:15:55,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 11650 transitions. [2021-06-05 06:15:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:55,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:55,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:56,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 06:15:56,029 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash -454373891, now seen corresponding path program 14 times [2021-06-05 06:15:56,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:56,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620112554] [2021-06-05 06:15:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:56,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:56,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620112554] [2021-06-05 06:15:56,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620112554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:56,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471362592] [2021-06-05 06:15:56,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:56,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:15:56,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:56,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:56,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:56,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471362592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:56,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:56,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 06:15:56,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768946476] [2021-06-05 06:15:56,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:15:56,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:56,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:15:56,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:15:56,156 INFO L87 Difference]: Start difference. First operand 3370 states and 11650 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:56,751 INFO L93 Difference]: Finished difference Result 7985 states and 25267 transitions. [2021-06-05 06:15:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:15:56,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:56,762 INFO L225 Difference]: With dead ends: 7985 [2021-06-05 06:15:56,763 INFO L226 Difference]: Without dead ends: 7985 [2021-06-05 06:15:56,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:15:56,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7985 states. [2021-06-05 06:15:56,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7985 to 3369. [2021-06-05 06:15:56,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.4557600950118763) internal successors, (11639), 3368 states have internal predecessors, (11639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 11639 transitions. [2021-06-05 06:15:56,832 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 11639 transitions. Word has length 27 [2021-06-05 06:15:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:56,832 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 11639 transitions. [2021-06-05 06:15:56,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 11639 transitions. [2021-06-05 06:15:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:56,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:56,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:57,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:57,038 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:57,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1213889404, now seen corresponding path program 15 times [2021-06-05 06:15:57,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:57,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575662842] [2021-06-05 06:15:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:57,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:57,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575662842] [2021-06-05 06:15:57,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575662842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:57,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085775812] [2021-06-05 06:15:57,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:57,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:15:57,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:57,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:57,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085775812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:57,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:57,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 06:15:57,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846804202] [2021-06-05 06:15:57,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:15:57,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:57,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:15:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:15:57,143 INFO L87 Difference]: Start difference. First operand 3369 states and 11639 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:57,313 INFO L93 Difference]: Finished difference Result 5144 states and 16955 transitions. [2021-06-05 06:15:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:15:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:57,320 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 06:15:57,320 INFO L226 Difference]: Without dead ends: 5133 [2021-06-05 06:15:57,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:15:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2021-06-05 06:15:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 3459. [2021-06-05 06:15:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 3.462695199537305) internal successors, (11974), 3458 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 11974 transitions. [2021-06-05 06:15:57,388 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 11974 transitions. Word has length 27 [2021-06-05 06:15:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:57,388 INFO L482 AbstractCegarLoop]: Abstraction has 3459 states and 11974 transitions. [2021-06-05 06:15:57,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 11974 transitions. [2021-06-05 06:15:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:57,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:57,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:57,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:57,594 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash -479704520, now seen corresponding path program 16 times [2021-06-05 06:15:57,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:57,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275352122] [2021-06-05 06:15:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:57,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:57,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275352122] [2021-06-05 06:15:57,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275352122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:57,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873769770] [2021-06-05 06:15:57,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:57,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:15:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:15:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:57,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873769770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:57,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:57,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 06:15:57,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722605109] [2021-06-05 06:15:57,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:15:57,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:15:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:15:57,722 INFO L87 Difference]: Start difference. First operand 3459 states and 11974 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:57,876 INFO L93 Difference]: Finished difference Result 5400 states and 17684 transitions. [2021-06-05 06:15:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:15:57,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:57,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:57,883 INFO L225 Difference]: With dead ends: 5400 [2021-06-05 06:15:57,883 INFO L226 Difference]: Without dead ends: 5400 [2021-06-05 06:15:57,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:15:57,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-06-05 06:15:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 3354. [2021-06-05 06:15:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 3.4446764091858038) internal successors, (11550), 3353 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 11550 transitions. [2021-06-05 06:15:57,937 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 11550 transitions. Word has length 27 [2021-06-05 06:15:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:57,937 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 11550 transitions. [2021-06-05 06:15:57,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 11550 transitions. [2021-06-05 06:15:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:57,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:57,942 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:58,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:58,142 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash -826283657, now seen corresponding path program 17 times [2021-06-05 06:15:58,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:58,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564033001] [2021-06-05 06:15:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:58,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:58,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564033001] [2021-06-05 06:15:58,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564033001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:58,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864337128] [2021-06-05 06:15:58,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:58,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:15:58,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:58,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:58,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864337128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:58,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:58,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 06:15:58,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424419739] [2021-06-05 06:15:58,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:58,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:58,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:58,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:58,283 INFO L87 Difference]: Start difference. First operand 3354 states and 11550 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:58,762 INFO L93 Difference]: Finished difference Result 7362 states and 23005 transitions. [2021-06-05 06:15:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:15:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:58,772 INFO L225 Difference]: With dead ends: 7362 [2021-06-05 06:15:58,773 INFO L226 Difference]: Without dead ends: 7362 [2021-06-05 06:15:58,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:15:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-06-05 06:15:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 3368. [2021-06-05 06:15:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 3.4460944460944463) internal successors, (11603), 3367 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 11603 transitions. [2021-06-05 06:15:58,840 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 11603 transitions. Word has length 27 [2021-06-05 06:15:58,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:58,840 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 11603 transitions. [2021-06-05 06:15:58,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:58,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 11603 transitions. [2021-06-05 06:15:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:58,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:58,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:59,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:59,046 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:59,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1015501955, now seen corresponding path program 18 times [2021-06-05 06:15:59,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:59,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39630536] [2021-06-05 06:15:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:59,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39630536] [2021-06-05 06:15:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39630536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840204700] [2021-06-05 06:15:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:59,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:15:59,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:15:59,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:59,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:15:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:15:59,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840204700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:59,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:15:59,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 06:15:59,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519877364] [2021-06-05 06:15:59,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:15:59,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:15:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:15:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:15:59,168 INFO L87 Difference]: Start difference. First operand 3368 states and 11603 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:15:59,602 INFO L93 Difference]: Finished difference Result 7148 states and 22493 transitions. [2021-06-05 06:15:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:15:59,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:15:59,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:15:59,612 INFO L225 Difference]: With dead ends: 7148 [2021-06-05 06:15:59,612 INFO L226 Difference]: Without dead ends: 7140 [2021-06-05 06:15:59,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:15:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-06-05 06:15:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3360. [2021-06-05 06:15:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-06-05 06:15:59,692 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-06-05 06:15:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:15:59,692 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-06-05 06:15:59,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:15:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-06-05 06:15:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:15:59,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:15:59,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:15:59,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 06:15:59,897 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:15:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:15:59,897 INFO L82 PathProgramCache]: Analyzing trace with hash 374019261, now seen corresponding path program 19 times [2021-06-05 06:15:59,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:15:59,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390055387] [2021-06-05 06:15:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:15:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:15:59,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:15:59,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390055387] [2021-06-05 06:15:59,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390055387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:15:59,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382815103] [2021-06-05 06:15:59,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:15:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:15:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:15:59,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:00,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382815103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:00,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:00,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 06:16:00,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198236523] [2021-06-05 06:16:00,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:16:00,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:00,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:16:00,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:16:00,063 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:00,710 INFO L93 Difference]: Finished difference Result 7312 states and 22866 transitions. [2021-06-05 06:16:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:16:00,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:00,720 INFO L225 Difference]: With dead ends: 7312 [2021-06-05 06:16:00,720 INFO L226 Difference]: Without dead ends: 7312 [2021-06-05 06:16:00,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:16:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2021-06-05 06:16:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 3366. [2021-06-05 06:16:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 3.444873699851412) internal successors, (11592), 3365 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 11592 transitions. [2021-06-05 06:16:00,785 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 11592 transitions. Word has length 27 [2021-06-05 06:16:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:00,785 INFO L482 AbstractCegarLoop]: Abstraction has 3366 states and 11592 transitions. [2021-06-05 06:16:00,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 11592 transitions. [2021-06-05 06:16:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:00,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:00,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:00,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 06:16:00,989 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2138298565, now seen corresponding path program 20 times [2021-06-05 06:16:00,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:00,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532518072] [2021-06-05 06:16:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:01,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:01,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532518072] [2021-06-05 06:16:01,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532518072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:01,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951675791] [2021-06-05 06:16:01,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:01,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:01,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:01,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:01,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951675791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:01,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:01,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-06-05 06:16:01,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801131554] [2021-06-05 06:16:01,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:16:01,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:01,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:16:01,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:16:01,171 INFO L87 Difference]: Start difference. First operand 3366 states and 11592 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:01,648 INFO L93 Difference]: Finished difference Result 7159 states and 22507 transitions. [2021-06-05 06:16:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:16:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:01,658 INFO L225 Difference]: With dead ends: 7159 [2021-06-05 06:16:01,659 INFO L226 Difference]: Without dead ends: 7151 [2021-06-05 06:16:01,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:16:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-05 06:16:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3360. [2021-06-05 06:16:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-06-05 06:16:01,725 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-06-05 06:16:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:01,725 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-06-05 06:16:01,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-06-05 06:16:01,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:01,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:01,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:01,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 06:16:01,939 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1533405914, now seen corresponding path program 21 times [2021-06-05 06:16:01,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:01,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982003807] [2021-06-05 06:16:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:01,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:01,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982003807] [2021-06-05 06:16:01,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982003807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:01,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468571310] [2021-06-05 06:16:01,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:02,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:02,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:02,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:16:02,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:02,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468571310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:02,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:02,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:16:02,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276043855] [2021-06-05 06:16:02,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:16:02,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:16:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:16:02,089 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:02,279 INFO L93 Difference]: Finished difference Result 5123 states and 16923 transitions. [2021-06-05 06:16:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:16:02,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:02,286 INFO L225 Difference]: With dead ends: 5123 [2021-06-05 06:16:02,286 INFO L226 Difference]: Without dead ends: 5123 [2021-06-05 06:16:02,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2021-06-05 06:16:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 4026. [2021-06-05 06:16:02,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.443726708074534) internal successors, (13861), 4025 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13861 transitions. [2021-06-05 06:16:02,360 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13861 transitions. Word has length 27 [2021-06-05 06:16:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:02,362 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 13861 transitions. [2021-06-05 06:16:02,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13861 transitions. [2021-06-05 06:16:02,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:02,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:02,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:02,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:02,581 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:02,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1095030085, now seen corresponding path program 22 times [2021-06-05 06:16:02,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:02,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007084925] [2021-06-05 06:16:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:02,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007084925] [2021-06-05 06:16:02,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007084925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373605855] [2021-06-05 06:16:02,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:02,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:02,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373605855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:02,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:02,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:16:02,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910142775] [2021-06-05 06:16:02,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:16:02,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:02,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:16:02,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:16:02,723 INFO L87 Difference]: Start difference. First operand 4026 states and 13861 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:03,309 INFO L93 Difference]: Finished difference Result 7661 states and 24465 transitions. [2021-06-05 06:16:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:16:03,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:03,321 INFO L225 Difference]: With dead ends: 7661 [2021-06-05 06:16:03,321 INFO L226 Difference]: Without dead ends: 7661 [2021-06-05 06:16:03,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:16:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7661 states. [2021-06-05 06:16:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7661 to 4388. [2021-06-05 06:16:03,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 3.4410759060861635) internal successors, (15096), 4387 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 15096 transitions. [2021-06-05 06:16:03,410 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 15096 transitions. Word has length 27 [2021-06-05 06:16:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:03,410 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 15096 transitions. [2021-06-05 06:16:03,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 15096 transitions. [2021-06-05 06:16:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:03,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:03,417 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:03,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 06:16:03,625 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1284248383, now seen corresponding path program 23 times [2021-06-05 06:16:03,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:03,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763861398] [2021-06-05 06:16:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:03,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:03,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763861398] [2021-06-05 06:16:03,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763861398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:03,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330045099] [2021-06-05 06:16:03,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:03,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:16:03,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:03,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:03,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:03,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330045099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:03,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:03,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:16:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736182500] [2021-06-05 06:16:03,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:16:03,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:03,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:16:03,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:16:03,768 INFO L87 Difference]: Start difference. First operand 4388 states and 15096 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:04,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:04,267 INFO L93 Difference]: Finished difference Result 7294 states and 23512 transitions. [2021-06-05 06:16:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:16:04,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:04,277 INFO L225 Difference]: With dead ends: 7294 [2021-06-05 06:16:04,277 INFO L226 Difference]: Without dead ends: 7286 [2021-06-05 06:16:04,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:16:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2021-06-05 06:16:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 4380. [2021-06-05 06:16:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.4405115323133137) internal successors, (15066), 4379 states have internal predecessors, (15066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 15066 transitions. [2021-06-05 06:16:04,356 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 15066 transitions. Word has length 27 [2021-06-05 06:16:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:04,357 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 15066 transitions. [2021-06-05 06:16:04,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 15066 transitions. [2021-06-05 06:16:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:04,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:04,362 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:04,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 06:16:04,562 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:04,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:04,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1799080439, now seen corresponding path program 9 times [2021-06-05 06:16:04,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:04,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985912501] [2021-06-05 06:16:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:04,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:04,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985912501] [2021-06-05 06:16:04,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985912501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304465022] [2021-06-05 06:16:04,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:04,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:04,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:04,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:16:04,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:04,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304465022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:04,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:04,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 06:16:04,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493642181] [2021-06-05 06:16:04,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:16:04,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:04,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:16:04,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:16:04,694 INFO L87 Difference]: Start difference. First operand 4380 states and 15066 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:04,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:04,903 INFO L93 Difference]: Finished difference Result 5160 states and 17337 transitions. [2021-06-05 06:16:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:16:04,903 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:04,911 INFO L225 Difference]: With dead ends: 5160 [2021-06-05 06:16:04,911 INFO L226 Difference]: Without dead ends: 5160 [2021-06-05 06:16:04,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:16:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-06-05 06:16:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 4419. [2021-06-05 06:16:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 3.438886373924853) internal successors, (15193), 4418 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 15193 transitions. [2021-06-05 06:16:04,983 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 15193 transitions. Word has length 27 [2021-06-05 06:16:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:04,984 INFO L482 AbstractCegarLoop]: Abstraction has 4419 states and 15193 transitions. [2021-06-05 06:16:04,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 15193 transitions. [2021-06-05 06:16:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:04,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:04,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:05,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:05,205 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash -640866123, now seen corresponding path program 24 times [2021-06-05 06:16:05,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:05,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037364708] [2021-06-05 06:16:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:05,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:05,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037364708] [2021-06-05 06:16:05,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037364708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:05,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43860085] [2021-06-05 06:16:05,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:05,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:16:05,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:05,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:05,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43860085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:05,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:05,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:16:05,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661876933] [2021-06-05 06:16:05,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:16:05,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:05,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:16:05,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:16:05,347 INFO L87 Difference]: Start difference. First operand 4419 states and 15193 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:05,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:05,802 INFO L93 Difference]: Finished difference Result 7167 states and 23253 transitions. [2021-06-05 06:16:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:16:05,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:05,812 INFO L225 Difference]: With dead ends: 7167 [2021-06-05 06:16:05,812 INFO L226 Difference]: Without dead ends: 7135 [2021-06-05 06:16:05,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:16:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2021-06-05 06:16:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 4447. [2021-06-05 06:16:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 3.435672514619883) internal successors, (15275), 4446 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 15275 transitions. [2021-06-05 06:16:05,887 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 15275 transitions. Word has length 27 [2021-06-05 06:16:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:05,887 INFO L482 AbstractCegarLoop]: Abstraction has 4447 states and 15275 transitions. [2021-06-05 06:16:05,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 15275 transitions. [2021-06-05 06:16:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:05,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:05,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:06,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 06:16:06,093 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:06,094 INFO L82 PathProgramCache]: Analyzing trace with hash -328510151, now seen corresponding path program 25 times [2021-06-05 06:16:06,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:06,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585928490] [2021-06-05 06:16:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:06,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:06,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585928490] [2021-06-05 06:16:06,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585928490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:06,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980603556] [2021-06-05 06:16:06,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:06,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:06,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:06,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980603556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:06,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:06,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:16:06,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704613402] [2021-06-05 06:16:06,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:16:06,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:06,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:16:06,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:16:06,229 INFO L87 Difference]: Start difference. First operand 4447 states and 15275 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:06,866 INFO L93 Difference]: Finished difference Result 7634 states and 24450 transitions. [2021-06-05 06:16:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:16:06,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:06,878 INFO L225 Difference]: With dead ends: 7634 [2021-06-05 06:16:06,878 INFO L226 Difference]: Without dead ends: 7634 [2021-06-05 06:16:06,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:16:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2021-06-05 06:16:06,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 4681. [2021-06-05 06:16:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 3.4264957264957263) internal successors, (16036), 4680 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 16036 transitions. [2021-06-05 06:16:06,964 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 16036 transitions. Word has length 27 [2021-06-05 06:16:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:06,965 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 16036 transitions. [2021-06-05 06:16:06,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 16036 transitions. [2021-06-05 06:16:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:06,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:06,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:07,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:07,171 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:07,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:07,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1454139319, now seen corresponding path program 26 times [2021-06-05 06:16:07,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:07,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478953453] [2021-06-05 06:16:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:07,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:07,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478953453] [2021-06-05 06:16:07,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478953453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:07,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234960054] [2021-06-05 06:16:07,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:07,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:07,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:07,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:07,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:07,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234960054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:07,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:07,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:16:07,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670084649] [2021-06-05 06:16:07,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:16:07,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:07,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:16:07,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:16:07,303 INFO L87 Difference]: Start difference. First operand 4681 states and 16036 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:07,850 INFO L93 Difference]: Finished difference Result 7391 states and 23828 transitions. [2021-06-05 06:16:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:16:07,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:07,861 INFO L225 Difference]: With dead ends: 7391 [2021-06-05 06:16:07,861 INFO L226 Difference]: Without dead ends: 7383 [2021-06-05 06:16:07,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:16:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-06-05 06:16:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 4675. [2021-06-05 06:16:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 3.4251176722293537) internal successors, (16009), 4674 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 16009 transitions. [2021-06-05 06:16:07,956 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 16009 transitions. Word has length 27 [2021-06-05 06:16:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:07,956 INFO L482 AbstractCegarLoop]: Abstraction has 4675 states and 16009 transitions. [2021-06-05 06:16:07,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 16009 transitions. [2021-06-05 06:16:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:07,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:07,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:08,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 06:16:08,177 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:08,177 INFO L82 PathProgramCache]: Analyzing trace with hash 609167867, now seen corresponding path program 27 times [2021-06-05 06:16:08,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:08,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825472115] [2021-06-05 06:16:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:08,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:08,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825472115] [2021-06-05 06:16:08,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825472115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:08,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208770565] [2021-06-05 06:16:08,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:08,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:16:08,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:08,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208770565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:08,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:08,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:16:08,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469580962] [2021-06-05 06:16:08,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:16:08,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:08,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:16:08,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:16:08,347 INFO L87 Difference]: Start difference. First operand 4675 states and 16009 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:08,843 INFO L93 Difference]: Finished difference Result 7057 states and 23013 transitions. [2021-06-05 06:16:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:16:08,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:08,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:08,855 INFO L225 Difference]: With dead ends: 7057 [2021-06-05 06:16:08,856 INFO L226 Difference]: Without dead ends: 7025 [2021-06-05 06:16:08,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:16:08,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7025 states. [2021-06-05 06:16:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7025 to 4719. [2021-06-05 06:16:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.42030521407376) internal successors, (16137), 4718 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16137 transitions. [2021-06-05 06:16:08,941 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16137 transitions. Word has length 27 [2021-06-05 06:16:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:08,941 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16137 transitions. [2021-06-05 06:16:08,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16137 transitions. [2021-06-05 06:16:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:08,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:08,947 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:09,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 06:16:09,148 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash 273764453, now seen corresponding path program 28 times [2021-06-05 06:16:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:09,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317962711] [2021-06-05 06:16:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:09,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:09,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317962711] [2021-06-05 06:16:09,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317962711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:09,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861389178] [2021-06-05 06:16:09,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:09,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:09,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:09,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:09,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861389178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:09,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:09,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:16:09,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129897383] [2021-06-05 06:16:09,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:16:09,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:09,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:16:09,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:16:09,298 INFO L87 Difference]: Start difference. First operand 4719 states and 16137 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:09,636 INFO L93 Difference]: Finished difference Result 6384 states and 21138 transitions. [2021-06-05 06:16:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:16:09,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:09,646 INFO L225 Difference]: With dead ends: 6384 [2021-06-05 06:16:09,646 INFO L226 Difference]: Without dead ends: 6384 [2021-06-05 06:16:09,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:16:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-06-05 06:16:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 4849. [2021-06-05 06:16:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 3.4096534653465347) internal successors, (16530), 4848 states have internal predecessors, (16530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 16530 transitions. [2021-06-05 06:16:09,736 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 16530 transitions. Word has length 27 [2021-06-05 06:16:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:09,736 INFO L482 AbstractCegarLoop]: Abstraction has 4849 states and 16530 transitions. [2021-06-05 06:16:09,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 16530 transitions. [2021-06-05 06:16:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:09,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:09,744 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:09,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:09,967 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:09,968 INFO L82 PathProgramCache]: Analyzing trace with hash 327227152, now seen corresponding path program 15 times [2021-06-05 06:16:09,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:09,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588141123] [2021-06-05 06:16:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:10,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:10,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588141123] [2021-06-05 06:16:10,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588141123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:10,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302894924] [2021-06-05 06:16:10,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:10,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:10,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:10,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:10,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:10,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302894924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:10,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:10,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:16:10,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299445398] [2021-06-05 06:16:10,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:16:10,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:10,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:16:10,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:16:10,075 INFO L87 Difference]: Start difference. First operand 4849 states and 16530 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:10,439 INFO L93 Difference]: Finished difference Result 6692 states and 22004 transitions. [2021-06-05 06:16:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:16:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:10,453 INFO L225 Difference]: With dead ends: 6692 [2021-06-05 06:16:10,453 INFO L226 Difference]: Without dead ends: 6692 [2021-06-05 06:16:10,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:16:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6692 states. [2021-06-05 06:16:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6692 to 4967. [2021-06-05 06:16:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4966 states have (on average 3.3987112364075713) internal successors, (16878), 4966 states have internal predecessors, (16878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 16878 transitions. [2021-06-05 06:16:10,558 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 16878 transitions. Word has length 27 [2021-06-05 06:16:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:10,558 INFO L482 AbstractCegarLoop]: Abstraction has 4967 states and 16878 transitions. [2021-06-05 06:16:10,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 16878 transitions. [2021-06-05 06:16:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:10,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:10,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:10,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 06:16:10,769 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:10,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash 921828852, now seen corresponding path program 16 times [2021-06-05 06:16:10,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:10,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299475689] [2021-06-05 06:16:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:10,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:10,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299475689] [2021-06-05 06:16:10,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299475689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:10,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451294239] [2021-06-05 06:16:10,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:10,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:10,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:10,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:16:10,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:10,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451294239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:10,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:10,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:16:10,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559101666] [2021-06-05 06:16:10,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:16:10,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:10,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:16:10,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:16:10,874 INFO L87 Difference]: Start difference. First operand 4967 states and 16878 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:11,149 INFO L93 Difference]: Finished difference Result 6568 states and 21695 transitions. [2021-06-05 06:16:11,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:16:11,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:11,159 INFO L225 Difference]: With dead ends: 6568 [2021-06-05 06:16:11,159 INFO L226 Difference]: Without dead ends: 6552 [2021-06-05 06:16:11,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:16:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-06-05 06:16:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 5075. [2021-06-05 06:16:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.3866771777690183) internal successors, (17184), 5074 states have internal predecessors, (17184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 17184 transitions. [2021-06-05 06:16:11,232 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 17184 transitions. Word has length 27 [2021-06-05 06:16:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:11,233 INFO L482 AbstractCegarLoop]: Abstraction has 5075 states and 17184 transitions. [2021-06-05 06:16:11,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 17184 transitions. [2021-06-05 06:16:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:16:11,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:11,238 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:11,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:11,439 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:11,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1636343253, now seen corresponding path program 10 times [2021-06-05 06:16:11,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:11,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299347605] [2021-06-05 06:16:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:11,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:11,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299347605] [2021-06-05 06:16:11,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299347605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:11,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268305097] [2021-06-05 06:16:11,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:11,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:11,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:11,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:16:11,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:11,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268305097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:11,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:11,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 06:16:11,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001819473] [2021-06-05 06:16:11,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:16:11,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:16:11,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:16:11,543 INFO L87 Difference]: Start difference. First operand 5075 states and 17184 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:11,740 INFO L93 Difference]: Finished difference Result 5593 states and 18688 transitions. [2021-06-05 06:16:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:16:11,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:16:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:11,747 INFO L225 Difference]: With dead ends: 5593 [2021-06-05 06:16:11,747 INFO L226 Difference]: Without dead ends: 5593 [2021-06-05 06:16:11,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:16:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-06-05 06:16:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 4995. [2021-06-05 06:16:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4994 states have (on average 3.383660392470965) internal successors, (16898), 4994 states have internal predecessors, (16898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 16898 transitions. [2021-06-05 06:16:11,809 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 16898 transitions. Word has length 27 [2021-06-05 06:16:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:11,809 INFO L482 AbstractCegarLoop]: Abstraction has 4995 states and 16898 transitions. [2021-06-05 06:16:11,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 16898 transitions. [2021-06-05 06:16:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:11,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:11,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:12,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 06:16:12,015 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:12,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1236304047, now seen corresponding path program 29 times [2021-06-05 06:16:12,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:12,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147888172] [2021-06-05 06:16:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:12,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:12,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147888172] [2021-06-05 06:16:12,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147888172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:12,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145661785] [2021-06-05 06:16:12,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:12,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:12,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:12,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:16:12,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:12,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:16:12,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:12,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:12,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:12,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 06:16:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:12,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145661785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:12,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:12,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:16:12,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643119480] [2021-06-05 06:16:12,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:16:12,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:12,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:16:12,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:16:12,381 INFO L87 Difference]: Start difference. First operand 4995 states and 16898 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:12,538 INFO L93 Difference]: Finished difference Result 5811 states and 19365 transitions. [2021-06-05 06:16:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:16:12,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:12,546 INFO L225 Difference]: With dead ends: 5811 [2021-06-05 06:16:12,546 INFO L226 Difference]: Without dead ends: 5742 [2021-06-05 06:16:12,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:16:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2021-06-05 06:16:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 5187. [2021-06-05 06:16:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 5186 states have (on average 3.3814114924797534) internal successors, (17536), 5186 states have internal predecessors, (17536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 17536 transitions. [2021-06-05 06:16:12,615 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 17536 transitions. Word has length 30 [2021-06-05 06:16:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:12,615 INFO L482 AbstractCegarLoop]: Abstraction has 5187 states and 17536 transitions. [2021-06-05 06:16:12,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 17536 transitions. [2021-06-05 06:16:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:12,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:12,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:12,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 06:16:12,822 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash 745415110, now seen corresponding path program 11 times [2021-06-05 06:16:12,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:12,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47587920] [2021-06-05 06:16:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:13,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:13,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47587920] [2021-06-05 06:16:13,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47587920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:13,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867234560] [2021-06-05 06:16:13,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:13,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:13,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:13,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:13,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:16:13,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:13,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:13,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:13,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:16:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:13,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867234560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:13,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:13,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:16:13,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890795313] [2021-06-05 06:16:13,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:16:13,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:13,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:16:13,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:16:13,543 INFO L87 Difference]: Start difference. First operand 5187 states and 17536 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:14,794 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 06:16:15,626 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 06:16:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:16,479 INFO L93 Difference]: Finished difference Result 8307 states and 27178 transitions. [2021-06-05 06:16:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:16:16,479 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:16,491 INFO L225 Difference]: With dead ends: 8307 [2021-06-05 06:16:16,491 INFO L226 Difference]: Without dead ends: 8281 [2021-06-05 06:16:16,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2463.6ms TimeCoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:16:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8281 states. [2021-06-05 06:16:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8281 to 5254. [2021-06-05 06:16:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5253 states have (on average 3.379211878926328) internal successors, (17751), 5253 states have internal predecessors, (17751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 17751 transitions. [2021-06-05 06:16:16,579 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 17751 transitions. Word has length 30 [2021-06-05 06:16:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:16,579 INFO L482 AbstractCegarLoop]: Abstraction has 5254 states and 17751 transitions. [2021-06-05 06:16:16,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 17751 transitions. [2021-06-05 06:16:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:16,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:16,585 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:16,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:16,786 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:16,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:16,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1233935798, now seen corresponding path program 12 times [2021-06-05 06:16:16,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:16,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953550610] [2021-06-05 06:16:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:16,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953550610] [2021-06-05 06:16:16,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953550610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48315433] [2021-06-05 06:16:16,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:17,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:16:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:16:17,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:17,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:17,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:16:17,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:16:17,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:17,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:17,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-06-05 06:16:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:17,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48315433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:17,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:17,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-06-05 06:16:17,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719540253] [2021-06-05 06:16:17,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:16:17,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:16:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:16:17,564 INFO L87 Difference]: Start difference. First operand 5254 states and 17751 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:20,295 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 06:16:21,482 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-06-05 06:16:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:21,488 INFO L93 Difference]: Finished difference Result 9505 states and 30456 transitions. [2021-06-05 06:16:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:16:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:21,509 INFO L225 Difference]: With dead ends: 9505 [2021-06-05 06:16:21,509 INFO L226 Difference]: Without dead ends: 9445 [2021-06-05 06:16:21,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 3153.8ms TimeCoverageRelationStatistics Valid=674, Invalid=5332, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:16:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2021-06-05 06:16:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 5277. [2021-06-05 06:16:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 3.3788855193328278) internal successors, (17827), 5276 states have internal predecessors, (17827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 17827 transitions. [2021-06-05 06:16:21,606 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 17827 transitions. Word has length 30 [2021-06-05 06:16:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:21,607 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 17827 transitions. [2021-06-05 06:16:21,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 17827 transitions. [2021-06-05 06:16:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:21,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:21,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:21,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:21,813 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:21,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1698612030, now seen corresponding path program 13 times [2021-06-05 06:16:21,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:21,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485266225] [2021-06-05 06:16:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:22,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:22,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485266225] [2021-06-05 06:16:22,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485266225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:22,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764860469] [2021-06-05 06:16:22,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:22,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:16:22,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:22,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:22,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:16:22,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:22,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:22,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:22,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:16:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:22,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764860469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:22,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:22,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:16:22,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22153925] [2021-06-05 06:16:22,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:16:22,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:22,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:16:22,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:16:22,489 INFO L87 Difference]: Start difference. First operand 5277 states and 17827 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:24,558 INFO L93 Difference]: Finished difference Result 6564 states and 21312 transitions. [2021-06-05 06:16:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:16:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:24,569 INFO L225 Difference]: With dead ends: 6564 [2021-06-05 06:16:24,569 INFO L226 Difference]: Without dead ends: 6534 [2021-06-05 06:16:24,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1727.2ms TimeCoverageRelationStatistics Valid=385, Invalid=2371, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:16:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2021-06-05 06:16:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5285. [2021-06-05 06:16:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5284 states have (on average 3.3783118849356546) internal successors, (17851), 5284 states have internal predecessors, (17851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 17851 transitions. [2021-06-05 06:16:24,650 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 17851 transitions. Word has length 30 [2021-06-05 06:16:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:24,650 INFO L482 AbstractCegarLoop]: Abstraction has 5285 states and 17851 transitions. [2021-06-05 06:16:24,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 17851 transitions. [2021-06-05 06:16:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:24,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:24,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:24,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 06:16:24,857 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash -721957958, now seen corresponding path program 14 times [2021-06-05 06:16:24,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:24,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298097365] [2021-06-05 06:16:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:25,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:25,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298097365] [2021-06-05 06:16:25,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298097365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:25,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461309754] [2021-06-05 06:16:25,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:25,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:25,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:25,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:25,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:25,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:25,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:16:25,321 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:16:25,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:25,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:25,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:16:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:25,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461309754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:25,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:25,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 06:16:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305670893] [2021-06-05 06:16:25,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:16:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:25,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:16:25,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:16:25,388 INFO L87 Difference]: Start difference. First operand 5285 states and 17851 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:28,514 INFO L93 Difference]: Finished difference Result 6989 states and 22642 transitions. [2021-06-05 06:16:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:16:28,515 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:28,525 INFO L225 Difference]: With dead ends: 6989 [2021-06-05 06:16:28,526 INFO L226 Difference]: Without dead ends: 6943 [2021-06-05 06:16:28,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2562.6ms TimeCoverageRelationStatistics Valid=557, Invalid=3999, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:16:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2021-06-05 06:16:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 5338. [2021-06-05 06:16:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.3814877271875585) internal successors, (18047), 5337 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18047 transitions. [2021-06-05 06:16:28,612 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18047 transitions. Word has length 30 [2021-06-05 06:16:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:28,613 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 18047 transitions. [2021-06-05 06:16:28,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18047 transitions. [2021-06-05 06:16:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:28,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:28,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:28,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:28,820 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:28,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1665366353, now seen corresponding path program 17 times [2021-06-05 06:16:28,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:28,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677608286] [2021-06-05 06:16:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:29,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:29,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677608286] [2021-06-05 06:16:29,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677608286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:29,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491895005] [2021-06-05 06:16:29,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:29,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:29,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:16:29,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:29,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:29,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:29,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:29,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:16:29,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:29,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:29,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:29,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:16:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:29,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491895005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:29,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:29,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:16:29,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906714276] [2021-06-05 06:16:29,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:16:29,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:16:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:16:29,708 INFO L87 Difference]: Start difference. First operand 5338 states and 18047 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:31,949 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 06:16:32,742 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 06:16:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:33,589 INFO L93 Difference]: Finished difference Result 7096 states and 23312 transitions. [2021-06-05 06:16:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:16:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:33,599 INFO L225 Difference]: With dead ends: 7096 [2021-06-05 06:16:33,600 INFO L226 Difference]: Without dead ends: 7070 [2021-06-05 06:16:33,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 3432.0ms TimeCoverageRelationStatistics Valid=537, Invalid=4293, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:16:33,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7070 states. [2021-06-05 06:16:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7070 to 5425. [2021-06-05 06:16:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 3.3737094395280236) internal successors, (18299), 5424 states have internal predecessors, (18299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 18299 transitions. [2021-06-05 06:16:33,680 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 18299 transitions. Word has length 30 [2021-06-05 06:16:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:33,680 INFO L482 AbstractCegarLoop]: Abstraction has 5425 states and 18299 transitions. [2021-06-05 06:16:33,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 18299 transitions. [2021-06-05 06:16:33,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:33,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:33,687 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:33,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:33,887 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:33,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1512137484, now seen corresponding path program 15 times [2021-06-05 06:16:33,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:33,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191874041] [2021-06-05 06:16:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:34,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:34,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191874041] [2021-06-05 06:16:34,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191874041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:34,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204701871] [2021-06-05 06:16:34,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:34,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:34,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:34,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:34,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:34,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:34,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:16:34,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:34,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:34,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:34,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 06:16:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:34,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204701871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:34,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:34,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:16:34,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773741503] [2021-06-05 06:16:34,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:16:34,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:34,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:16:34,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:16:34,621 INFO L87 Difference]: Start difference. First operand 5425 states and 18299 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:36,477 INFO L93 Difference]: Finished difference Result 6660 states and 21646 transitions. [2021-06-05 06:16:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:16:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:36,488 INFO L225 Difference]: With dead ends: 6660 [2021-06-05 06:16:36,488 INFO L226 Difference]: Without dead ends: 6630 [2021-06-05 06:16:36,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1697.1ms TimeCoverageRelationStatistics Valid=349, Invalid=2101, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:16:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2021-06-05 06:16:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 5428. [2021-06-05 06:16:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3738713838216325) internal successors, (18310), 5427 states have internal predecessors, (18310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18310 transitions. [2021-06-05 06:16:36,570 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18310 transitions. Word has length 30 [2021-06-05 06:16:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:36,570 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 18310 transitions. [2021-06-05 06:16:36,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18310 transitions. [2021-06-05 06:16:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:36,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:36,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:36,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 06:16:36,778 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1854264556, now seen corresponding path program 16 times [2021-06-05 06:16:36,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:36,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662404919] [2021-06-05 06:16:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:37,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662404919] [2021-06-05 06:16:37,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662404919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:37,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947537084] [2021-06-05 06:16:37,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:37,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:37,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:16:37,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:37,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:37,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:16:37,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:37,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:37,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:37,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:16:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:37,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947537084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:37,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:37,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:16:37,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586270310] [2021-06-05 06:16:37,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:16:37,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:37,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:16:37,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:16:37,336 INFO L87 Difference]: Start difference. First operand 5428 states and 18310 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:39,594 INFO L93 Difference]: Finished difference Result 6861 states and 22152 transitions. [2021-06-05 06:16:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:16:39,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:39,604 INFO L225 Difference]: With dead ends: 6861 [2021-06-05 06:16:39,604 INFO L226 Difference]: Without dead ends: 6831 [2021-06-05 06:16:39,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 2037.4ms TimeCoverageRelationStatistics Valid=467, Invalid=2839, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:16:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6831 states. [2021-06-05 06:16:39,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6831 to 5431. [2021-06-05 06:16:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 3.3740331491712707) internal successors, (18321), 5430 states have internal predecessors, (18321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 18321 transitions. [2021-06-05 06:16:39,683 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 18321 transitions. Word has length 30 [2021-06-05 06:16:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:39,683 INFO L482 AbstractCegarLoop]: Abstraction has 5431 states and 18321 transitions. [2021-06-05 06:16:39,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 18321 transitions. [2021-06-05 06:16:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:39,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:39,689 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:39,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:39,890 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash 822848258, now seen corresponding path program 17 times [2021-06-05 06:16:39,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:39,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486457205] [2021-06-05 06:16:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:40,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:40,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486457205] [2021-06-05 06:16:40,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486457205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:40,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326549024] [2021-06-05 06:16:40,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:40,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:16:40,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:40,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:16:40,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:40,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:40,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:40,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:16:40,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:40,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:40,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:40,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 06:16:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:40,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326549024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:40,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:40,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-05 06:16:40,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646636420] [2021-06-05 06:16:40,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:16:40,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:40,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:16:40,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:16:40,458 INFO L87 Difference]: Start difference. First operand 5431 states and 18321 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:41,614 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 06:16:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:43,070 INFO L93 Difference]: Finished difference Result 6718 states and 21814 transitions. [2021-06-05 06:16:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:16:43,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:43,082 INFO L225 Difference]: With dead ends: 6718 [2021-06-05 06:16:43,082 INFO L226 Difference]: Without dead ends: 6688 [2021-06-05 06:16:43,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2143.0ms TimeCoverageRelationStatistics Valid=430, Invalid=2762, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:16:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-06-05 06:16:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 5426. [2021-06-05 06:16:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5426 states, 5425 states have (on average 3.3741935483870966) internal successors, (18305), 5425 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5426 states to 5426 states and 18305 transitions. [2021-06-05 06:16:43,168 INFO L78 Accepts]: Start accepts. Automaton has 5426 states and 18305 transitions. Word has length 30 [2021-06-05 06:16:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:43,168 INFO L482 AbstractCegarLoop]: Abstraction has 5426 states and 18305 transitions. [2021-06-05 06:16:43,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5426 states and 18305 transitions. [2021-06-05 06:16:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:43,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:43,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:43,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:43,375 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:43,376 INFO L82 PathProgramCache]: Analyzing trace with hash -727723502, now seen corresponding path program 18 times [2021-06-05 06:16:43,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:43,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151364809] [2021-06-05 06:16:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:43,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151364809] [2021-06-05 06:16:43,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151364809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:43,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868685401] [2021-06-05 06:16:43,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:43,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:16:43,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:16:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:43,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:43,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:16:43,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:16:43,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:43,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:43,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 06:16:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:43,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868685401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:43,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:43,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 06:16:43,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044918210] [2021-06-05 06:16:43,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:16:43,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:43,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:16:43,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:16:43,936 INFO L87 Difference]: Start difference. First operand 5426 states and 18305 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:46,222 INFO L93 Difference]: Finished difference Result 9647 states and 31226 transitions. [2021-06-05 06:16:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:16:46,223 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:46,238 INFO L225 Difference]: With dead ends: 9647 [2021-06-05 06:16:46,238 INFO L226 Difference]: Without dead ends: 9632 [2021-06-05 06:16:46,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1487.3ms TimeCoverageRelationStatistics Valid=445, Invalid=3337, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:16:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-06-05 06:16:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 5430. [2021-06-05 06:16:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5430 states, 5429 states have (on average 3.375391416467121) internal successors, (18325), 5429 states have internal predecessors, (18325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5430 states to 5430 states and 18325 transitions. [2021-06-05 06:16:46,349 INFO L78 Accepts]: Start accepts. Automaton has 5430 states and 18325 transitions. Word has length 30 [2021-06-05 06:16:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:46,349 INFO L482 AbstractCegarLoop]: Abstraction has 5430 states and 18325 transitions. [2021-06-05 06:16:46,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5430 states and 18325 transitions. [2021-06-05 06:16:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:46,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:46,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:46,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 06:16:46,557 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1710814064, now seen corresponding path program 19 times [2021-06-05 06:16:46,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:46,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932755296] [2021-06-05 06:16:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:46,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:46,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932755296] [2021-06-05 06:16:46,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932755296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:46,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511450985] [2021-06-05 06:16:46,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:16:46,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:47,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:47,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:16:47,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:16:47,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:16:47,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:47,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:47,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:16:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:47,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511450985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:47,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:47,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:16:47,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767663372] [2021-06-05 06:16:47,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:16:47,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:47,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:16:47,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:16:47,096 INFO L87 Difference]: Start difference. First operand 5430 states and 18325 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:50,438 INFO L93 Difference]: Finished difference Result 9941 states and 32572 transitions. [2021-06-05 06:16:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:16:50,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:50,454 INFO L225 Difference]: With dead ends: 9941 [2021-06-05 06:16:50,454 INFO L226 Difference]: Without dead ends: 9926 [2021-06-05 06:16:50,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 2683.7ms TimeCoverageRelationStatistics Valid=728, Invalid=5124, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:16:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-06-05 06:16:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 5432. [2021-06-05 06:16:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 3.3758055606702264) internal successors, (18334), 5431 states have internal predecessors, (18334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 18334 transitions. [2021-06-05 06:16:50,595 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 18334 transitions. Word has length 30 [2021-06-05 06:16:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:50,595 INFO L482 AbstractCegarLoop]: Abstraction has 5432 states and 18334 transitions. [2021-06-05 06:16:50,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 18334 transitions. [2021-06-05 06:16:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:50,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:50,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:50,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:50,803 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash -811045396, now seen corresponding path program 20 times [2021-06-05 06:16:50,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:50,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693378234] [2021-06-05 06:16:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:50,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:50,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693378234] [2021-06-05 06:16:50,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693378234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:50,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359226223] [2021-06-05 06:16:50,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:51,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:16:51,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:51,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:16:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:16:51,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:51,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:16:51,186 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:16:51,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:51,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:51,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:16:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:51,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359226223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:51,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:51,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:16:51,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251690422] [2021-06-05 06:16:51,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:16:51,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:51,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:16:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:16:51,261 INFO L87 Difference]: Start difference. First operand 5432 states and 18334 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:55,224 INFO L93 Difference]: Finished difference Result 11162 states and 36367 transitions. [2021-06-05 06:16:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 06:16:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:55,242 INFO L225 Difference]: With dead ends: 11162 [2021-06-05 06:16:55,242 INFO L226 Difference]: Without dead ends: 11122 [2021-06-05 06:16:55,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2904.9ms TimeCoverageRelationStatistics Valid=893, Invalid=6247, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:16:55,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-06-05 06:16:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 5474. [2021-06-05 06:16:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.379499360496985) internal successors, (18496), 5473 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18496 transitions. [2021-06-05 06:16:55,360 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18496 transitions. Word has length 30 [2021-06-05 06:16:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:55,360 INFO L482 AbstractCegarLoop]: Abstraction has 5474 states and 18496 transitions. [2021-06-05 06:16:55,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18496 transitions. [2021-06-05 06:16:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:55,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:55,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:55,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 06:16:55,569 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash -871815986, now seen corresponding path program 21 times [2021-06-05 06:16:55,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:55,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504649796] [2021-06-05 06:16:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:55,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504649796] [2021-06-05 06:16:55,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504649796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:55,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729839583] [2021-06-05 06:16:55,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:55,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:16:55,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:16:55,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:16:56,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:56,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:16:56,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:16:56,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:16:56,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:16:56,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 06:16:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:56,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729839583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:56,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:16:56,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 06:16:56,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143060175] [2021-06-05 06:16:56,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:16:56,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:16:56,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:16:56,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:16:56,382 INFO L87 Difference]: Start difference. First operand 5474 states and 18496 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:57,759 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 06:16:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:16:59,212 INFO L93 Difference]: Finished difference Result 7786 states and 25626 transitions. [2021-06-05 06:16:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:16:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:16:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:16:59,225 INFO L225 Difference]: With dead ends: 7786 [2021-06-05 06:16:59,225 INFO L226 Difference]: Without dead ends: 7726 [2021-06-05 06:16:59,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2574.1ms TimeCoverageRelationStatistics Valid=415, Invalid=2665, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:16:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-05 06:16:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5478. [2021-06-05 06:16:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 3.3795873653459925) internal successors, (18510), 5477 states have internal predecessors, (18510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 18510 transitions. [2021-06-05 06:16:59,317 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 18510 transitions. Word has length 30 [2021-06-05 06:16:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:16:59,317 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 18510 transitions. [2021-06-05 06:16:59,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:16:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 18510 transitions. [2021-06-05 06:16:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:16:59,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:16:59,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:16:59,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:59,523 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:16:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:16:59,524 INFO L82 PathProgramCache]: Analyzing trace with hash -462088070, now seen corresponding path program 22 times [2021-06-05 06:16:59,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:16:59,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753553119] [2021-06-05 06:16:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:16:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:16:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:16:59,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:16:59,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753553119] [2021-06-05 06:16:59,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753553119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:16:59,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087256342] [2021-06-05 06:16:59,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:16:59,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:16:59,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:16:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:16:59,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:00,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:00,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:00,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:17:00,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:00,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:00,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:17:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:00,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087256342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:00,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:00,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:17:00,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407795599] [2021-06-05 06:17:00,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:17:00,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:00,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:17:00,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:17:00,044 INFO L87 Difference]: Start difference. First operand 5478 states and 18510 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:02,491 INFO L93 Difference]: Finished difference Result 7437 states and 24428 transitions. [2021-06-05 06:17:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:17:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:02,502 INFO L225 Difference]: With dead ends: 7437 [2021-06-05 06:17:02,502 INFO L226 Difference]: Without dead ends: 7422 [2021-06-05 06:17:02,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2051.3ms TimeCoverageRelationStatistics Valid=550, Invalid=3110, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:17:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-06-05 06:17:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 5480. [2021-06-05 06:17:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5479 states have (on average 3.37999634969885) internal successors, (18519), 5479 states have internal predecessors, (18519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 18519 transitions. [2021-06-05 06:17:02,589 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 18519 transitions. Word has length 30 [2021-06-05 06:17:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:02,589 INFO L482 AbstractCegarLoop]: Abstraction has 5480 states and 18519 transitions. [2021-06-05 06:17:02,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 18519 transitions. [2021-06-05 06:17:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:02,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:02,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:02,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 06:17:02,796 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1933873822, now seen corresponding path program 23 times [2021-06-05 06:17:02,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:02,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27908325] [2021-06-05 06:17:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:03,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:03,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27908325] [2021-06-05 06:17:03,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27908325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:03,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927076592] [2021-06-05 06:17:03,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:03,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:17:03,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:03,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:17:03,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:03,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:03,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:03,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:17:03,315 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:17:03,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:03,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:03,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:17:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:03,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927076592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:03,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:03,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 06:17:03,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900773079] [2021-06-05 06:17:03,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:17:03,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:03,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:17:03,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:17:03,398 INFO L87 Difference]: Start difference. First operand 5480 states and 18519 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:07,619 INFO L93 Difference]: Finished difference Result 8651 states and 28099 transitions. [2021-06-05 06:17:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:17:07,619 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:07,631 INFO L225 Difference]: With dead ends: 8651 [2021-06-05 06:17:07,632 INFO L226 Difference]: Without dead ends: 8626 [2021-06-05 06:17:07,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 3503.9ms TimeCoverageRelationStatistics Valid=720, Invalid=5442, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:17:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-06-05 06:17:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 5486. [2021-06-05 06:17:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 3.3808568824065635) internal successors, (18544), 5485 states have internal predecessors, (18544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 18544 transitions. [2021-06-05 06:17:07,728 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 18544 transitions. Word has length 30 [2021-06-05 06:17:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:07,728 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 18544 transitions. [2021-06-05 06:17:07,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 18544 transitions. [2021-06-05 06:17:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:07,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:07,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:07,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 06:17:07,935 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:07,935 INFO L82 PathProgramCache]: Analyzing trace with hash 372399859, now seen corresponding path program 18 times [2021-06-05 06:17:07,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:07,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157616084] [2021-06-05 06:17:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:08,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:08,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157616084] [2021-06-05 06:17:08,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157616084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:08,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989424665] [2021-06-05 06:17:08,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:08,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:17:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:17:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:08,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:08,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:08,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:08,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 06:17:08,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:17:08,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:08,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:08,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-05 06:17:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:08,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989424665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:08,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:08,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 06:17:08,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432664769] [2021-06-05 06:17:08,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:17:08,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:08,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:17:08,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:17:08,856 INFO L87 Difference]: Start difference. First operand 5486 states and 18544 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:14,267 INFO L93 Difference]: Finished difference Result 8032 states and 26021 transitions. [2021-06-05 06:17:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 06:17:14,267 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:14,279 INFO L225 Difference]: With dead ends: 8032 [2021-06-05 06:17:14,279 INFO L226 Difference]: Without dead ends: 7995 [2021-06-05 06:17:14,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 4458.7ms TimeCoverageRelationStatistics Valid=950, Invalid=7606, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 06:17:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-05 06:17:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 5520. [2021-06-05 06:17:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5520 states, 5519 states have (on average 3.3812284834209096) internal successors, (18661), 5519 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5520 states to 5520 states and 18661 transitions. [2021-06-05 06:17:14,360 INFO L78 Accepts]: Start accepts. Automaton has 5520 states and 18661 transitions. Word has length 30 [2021-06-05 06:17:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:14,360 INFO L482 AbstractCegarLoop]: Abstraction has 5520 states and 18661 transitions. [2021-06-05 06:17:14,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5520 states and 18661 transitions. [2021-06-05 06:17:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:14,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:14,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:14,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 06:17:14,567 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:14,567 INFO L82 PathProgramCache]: Analyzing trace with hash 577548821, now seen corresponding path program 19 times [2021-06-05 06:17:14,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:14,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431967325] [2021-06-05 06:17:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:14,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:14,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431967325] [2021-06-05 06:17:14,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431967325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:14,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205875933] [2021-06-05 06:17:14,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:17:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:15,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:15,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:15,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:15,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:17:15,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:15,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:15,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:15,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:17:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:15,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205875933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:15,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:15,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 06:17:15,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498556229] [2021-06-05 06:17:15,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:17:15,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:15,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:17:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:17:15,154 INFO L87 Difference]: Start difference. First operand 5520 states and 18661 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:18,157 INFO L93 Difference]: Finished difference Result 9535 states and 31254 transitions. [2021-06-05 06:17:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:17:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:18,173 INFO L225 Difference]: With dead ends: 9535 [2021-06-05 06:17:18,173 INFO L226 Difference]: Without dead ends: 9505 [2021-06-05 06:17:18,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 2613.8ms TimeCoverageRelationStatistics Valid=693, Invalid=3863, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:17:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9505 states. [2021-06-05 06:17:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9505 to 5583. [2021-06-05 06:17:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 3.3885704048728056) internal successors, (18915), 5582 states have internal predecessors, (18915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 18915 transitions. [2021-06-05 06:17:18,274 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 18915 transitions. Word has length 30 [2021-06-05 06:17:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:18,274 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 18915 transitions. [2021-06-05 06:17:18,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 18915 transitions. [2021-06-05 06:17:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:18,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:18,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:18,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:18,482 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:18,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1944310639, now seen corresponding path program 20 times [2021-06-05 06:17:18,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:18,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856382747] [2021-06-05 06:17:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:18,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:18,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856382747] [2021-06-05 06:17:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856382747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:18,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174502722] [2021-06-05 06:17:18,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:18,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:18,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:18,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:17:18,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:19,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:19,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:19,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 06:17:19,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:17:19,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:19,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:19,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 06:17:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:19,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174502722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:19,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:19,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 06:17:19,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337117905] [2021-06-05 06:17:19,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:17:19,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:17:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:17:19,108 INFO L87 Difference]: Start difference. First operand 5583 states and 18915 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:25,875 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 06:17:26,910 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 06:17:27,293 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 06:17:27,695 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 06:17:27,868 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 06:17:28,343 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 06:17:29,761 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-05 06:17:29,900 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 06:17:30,245 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 06:17:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:30,630 INFO L93 Difference]: Finished difference Result 11977 states and 38541 transitions. [2021-06-05 06:17:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 06:17:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:30,649 INFO L225 Difference]: With dead ends: 11977 [2021-06-05 06:17:30,649 INFO L226 Difference]: Without dead ends: 11930 [2021-06-05 06:17:30,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 10123.9ms TimeCoverageRelationStatistics Valid=3976, Invalid=22756, Unknown=0, NotChecked=0, Total=26732 [2021-06-05 06:17:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11930 states. [2021-06-05 06:17:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11930 to 5693. [2021-06-05 06:17:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5693 states, 5692 states have (on average 3.3979269149683766) internal successors, (19341), 5692 states have internal predecessors, (19341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5693 states to 5693 states and 19341 transitions. [2021-06-05 06:17:30,777 INFO L78 Accepts]: Start accepts. Automaton has 5693 states and 19341 transitions. Word has length 30 [2021-06-05 06:17:30,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:30,777 INFO L482 AbstractCegarLoop]: Abstraction has 5693 states and 19341 transitions. [2021-06-05 06:17:30,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5693 states and 19341 transitions. [2021-06-05 06:17:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:30,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:30,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:30,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 06:17:30,985 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:30,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1119676269, now seen corresponding path program 21 times [2021-06-05 06:17:30,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:30,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791193925] [2021-06-05 06:17:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:31,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:31,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791193925] [2021-06-05 06:17:31,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791193925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:31,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838463238] [2021-06-05 06:17:31,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:31,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:17:31,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:31,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:17:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:31,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:31,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:31,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:31,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:17:31,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:31,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:31,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:31,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:17:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838463238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:31,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:31,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:17:31,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755181332] [2021-06-05 06:17:31,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:17:31,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:31,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:17:31,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:17:31,762 INFO L87 Difference]: Start difference. First operand 5693 states and 19341 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:35,849 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2021-06-05 06:17:36,626 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 06:17:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:37,169 INFO L93 Difference]: Finished difference Result 7655 states and 25147 transitions. [2021-06-05 06:17:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:17:37,169 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:37,180 INFO L225 Difference]: With dead ends: 7655 [2021-06-05 06:17:37,181 INFO L226 Difference]: Without dead ends: 7629 [2021-06-05 06:17:37,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 4455.2ms TimeCoverageRelationStatistics Valid=738, Invalid=6234, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 06:17:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2021-06-05 06:17:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 5684. [2021-06-05 06:17:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5684 states, 5683 states have (on average 3.39767728312511) internal successors, (19309), 5683 states have internal predecessors, (19309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5684 states to 5684 states and 19309 transitions. [2021-06-05 06:17:37,267 INFO L78 Accepts]: Start accepts. Automaton has 5684 states and 19309 transitions. Word has length 30 [2021-06-05 06:17:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:37,267 INFO L482 AbstractCegarLoop]: Abstraction has 5684 states and 19309 transitions. [2021-06-05 06:17:37,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5684 states and 19309 transitions. [2021-06-05 06:17:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:37,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:37,274 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:37,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 06:17:37,475 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:37,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1069732346, now seen corresponding path program 24 times [2021-06-05 06:17:37,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:37,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364912280] [2021-06-05 06:17:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:37,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:37,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364912280] [2021-06-05 06:17:37,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364912280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:37,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295100568] [2021-06-05 06:17:37,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:37,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:17:37,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:37,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:17:37,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:38,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:38,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:38,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:17:38,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:38,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:38,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:38,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:17:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:38,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295100568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:38,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:38,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:17:38,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490543922] [2021-06-05 06:17:38,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:17:38,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:17:38,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:17:38,062 INFO L87 Difference]: Start difference. First operand 5684 states and 19309 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:39,851 INFO L93 Difference]: Finished difference Result 6886 states and 22588 transitions. [2021-06-05 06:17:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:17:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:39,861 INFO L225 Difference]: With dead ends: 6886 [2021-06-05 06:17:39,861 INFO L226 Difference]: Without dead ends: 6871 [2021-06-05 06:17:39,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1487.0ms TimeCoverageRelationStatistics Valid=318, Invalid=2132, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:17:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-06-05 06:17:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 5694. [2021-06-05 06:17:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3975057087651503) internal successors, (19342), 5693 states have internal predecessors, (19342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19342 transitions. [2021-06-05 06:17:39,943 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19342 transitions. Word has length 30 [2021-06-05 06:17:39,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:39,943 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19342 transitions. [2021-06-05 06:17:39,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:39,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19342 transitions. [2021-06-05 06:17:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:39,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:39,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:40,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:40,151 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:40,151 INFO L82 PathProgramCache]: Analyzing trace with hash 804664962, now seen corresponding path program 25 times [2021-06-05 06:17:40,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:40,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033323389] [2021-06-05 06:17:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:40,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:40,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033323389] [2021-06-05 06:17:40,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033323389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:40,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711339673] [2021-06-05 06:17:40,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:40,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:17:40,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:40,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:40,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:17:40,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:40,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:40,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:40,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:17:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:40,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711339673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:40,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:40,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:17:40,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308577003] [2021-06-05 06:17:40,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:17:40,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:40,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:17:40,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:17:40,673 INFO L87 Difference]: Start difference. First operand 5694 states and 19342 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:42,119 INFO L93 Difference]: Finished difference Result 6877 states and 22547 transitions. [2021-06-05 06:17:42,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:17:42,119 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:42,129 INFO L225 Difference]: With dead ends: 6877 [2021-06-05 06:17:42,129 INFO L226 Difference]: Without dead ends: 6847 [2021-06-05 06:17:42,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1367.5ms TimeCoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:17:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2021-06-05 06:17:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 5686. [2021-06-05 06:17:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5686 states, 5685 states have (on average 3.39806508355321) internal successors, (19318), 5685 states have internal predecessors, (19318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 19318 transitions. [2021-06-05 06:17:42,212 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 19318 transitions. Word has length 30 [2021-06-05 06:17:42,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:42,212 INFO L482 AbstractCegarLoop]: Abstraction has 5686 states and 19318 transitions. [2021-06-05 06:17:42,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 19318 transitions. [2021-06-05 06:17:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:42,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:42,219 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:42,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:42,419 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2028611540, now seen corresponding path program 26 times [2021-06-05 06:17:42,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:42,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329668124] [2021-06-05 06:17:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:42,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:42,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329668124] [2021-06-05 06:17:42,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329668124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:42,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876017440] [2021-06-05 06:17:42,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:42,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:17:42,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:17:42,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:43,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:43,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:43,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 06:17:43,047 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:17:43,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:43,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:43,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:17:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:43,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876017440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:43,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:43,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:17:43,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353824120] [2021-06-05 06:17:43,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:17:43,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:43,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:17:43,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:17:43,119 INFO L87 Difference]: Start difference. First operand 5686 states and 19318 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:45,926 INFO L93 Difference]: Finished difference Result 10041 states and 32850 transitions. [2021-06-05 06:17:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:17:45,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:45,942 INFO L225 Difference]: With dead ends: 10041 [2021-06-05 06:17:45,942 INFO L226 Difference]: Without dead ends: 9990 [2021-06-05 06:17:45,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2147.3ms TimeCoverageRelationStatistics Valid=588, Invalid=3444, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:17:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-06-05 06:17:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 5722. [2021-06-05 06:17:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 5721 states have (on average 3.3997552875371437) internal successors, (19450), 5721 states have internal predecessors, (19450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 19450 transitions. [2021-06-05 06:17:46,050 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 19450 transitions. Word has length 30 [2021-06-05 06:17:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:46,051 INFO L482 AbstractCegarLoop]: Abstraction has 5722 states and 19450 transitions. [2021-06-05 06:17:46,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 19450 transitions. [2021-06-05 06:17:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:46,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:46,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:46,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:46,258 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:46,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:46,258 INFO L82 PathProgramCache]: Analyzing trace with hash 904208534, now seen corresponding path program 27 times [2021-06-05 06:17:46,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:46,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143461151] [2021-06-05 06:17:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:46,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:46,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143461151] [2021-06-05 06:17:46,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143461151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:46,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497999668] [2021-06-05 06:17:46,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:46,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:17:46,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:17:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:46,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:46,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:17:46,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:17:46,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:46,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:46,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 06:17:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:46,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497999668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:46,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:46,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 06:17:46,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515307648] [2021-06-05 06:17:46,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:17:46,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:17:46,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:17:46,983 INFO L87 Difference]: Start difference. First operand 5722 states and 19450 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:48,138 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 06:17:50,079 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 06:17:52,624 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 06:17:52,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:52,745 INFO L93 Difference]: Finished difference Result 9402 states and 30638 transitions. [2021-06-05 06:17:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 06:17:52,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:52,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:52,759 INFO L225 Difference]: With dead ends: 9402 [2021-06-05 06:17:52,759 INFO L226 Difference]: Without dead ends: 9361 [2021-06-05 06:17:52,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4834.2ms TimeCoverageRelationStatistics Valid=1092, Invalid=9008, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 06:17:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2021-06-05 06:17:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 5721. [2021-06-05 06:17:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5721 states, 5720 states have (on average 3.3998251748251747) internal successors, (19447), 5720 states have internal predecessors, (19447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5721 states to 5721 states and 19447 transitions. [2021-06-05 06:17:52,863 INFO L78 Accepts]: Start accepts. Automaton has 5721 states and 19447 transitions. Word has length 30 [2021-06-05 06:17:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:52,863 INFO L482 AbstractCegarLoop]: Abstraction has 5721 states and 19447 transitions. [2021-06-05 06:17:52,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 5721 states and 19447 transitions. [2021-06-05 06:17:52,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:52,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:52,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:53,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 06:17:53,070 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:53,070 INFO L82 PathProgramCache]: Analyzing trace with hash 981599646, now seen corresponding path program 28 times [2021-06-05 06:17:53,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:53,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711126823] [2021-06-05 06:17:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:53,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:53,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711126823] [2021-06-05 06:17:53,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711126823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:53,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493139417] [2021-06-05 06:17:53,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:53,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:17:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:17:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:53,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:53,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:53,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:17:53,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:53,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:53,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:53,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:17:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:53,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493139417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:53,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:53,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:17:53,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546506512] [2021-06-05 06:17:53,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:17:53,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:53,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:17:53,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:17:53,589 INFO L87 Difference]: Start difference. First operand 5721 states and 19447 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:55,166 INFO L93 Difference]: Finished difference Result 7360 states and 24539 transitions. [2021-06-05 06:17:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:17:55,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:55,177 INFO L225 Difference]: With dead ends: 7360 [2021-06-05 06:17:55,178 INFO L226 Difference]: Without dead ends: 7345 [2021-06-05 06:17:55,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1304.7ms TimeCoverageRelationStatistics Valid=306, Invalid=1856, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:17:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7345 states. [2021-06-05 06:17:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7345 to 5726. [2021-06-05 06:17:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5726 states, 5725 states have (on average 3.399475982532751) internal successors, (19462), 5725 states have internal predecessors, (19462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5726 states to 5726 states and 19462 transitions. [2021-06-05 06:17:55,263 INFO L78 Accepts]: Start accepts. Automaton has 5726 states and 19462 transitions. Word has length 30 [2021-06-05 06:17:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:55,263 INFO L482 AbstractCegarLoop]: Abstraction has 5726 states and 19462 transitions. [2021-06-05 06:17:55,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5726 states and 19462 transitions. [2021-06-05 06:17:55,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:55,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:55,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:55,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:55,470 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash -932624076, now seen corresponding path program 29 times [2021-06-05 06:17:55,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:55,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747467965] [2021-06-05 06:17:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:55,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:55,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747467965] [2021-06-05 06:17:55,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747467965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:55,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128118298] [2021-06-05 06:17:55,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:55,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:17:55,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:17:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:55,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:55,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:17:55,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:17:55,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:17:55,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:55,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:55,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 06:17:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:55,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128118298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:55,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:55,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 06:17:55,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409901556] [2021-06-05 06:17:55,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:17:55,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:55,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:17:55,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:17:55,949 INFO L87 Difference]: Start difference. First operand 5726 states and 19462 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:17:57,595 INFO L93 Difference]: Finished difference Result 7333 states and 24469 transitions. [2021-06-05 06:17:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:17:57,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:17:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:17:57,607 INFO L225 Difference]: With dead ends: 7333 [2021-06-05 06:17:57,607 INFO L226 Difference]: Without dead ends: 7318 [2021-06-05 06:17:57,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1308.6ms TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:17:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2021-06-05 06:17:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 5723. [2021-06-05 06:17:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.399860188745194) internal successors, (19454), 5722 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19454 transitions. [2021-06-05 06:17:57,720 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19454 transitions. Word has length 30 [2021-06-05 06:17:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:17:57,720 INFO L482 AbstractCegarLoop]: Abstraction has 5723 states and 19454 transitions. [2021-06-05 06:17:57,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:17:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19454 transitions. [2021-06-05 06:17:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:17:57,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:17:57,728 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:17:57,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:57,929 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:17:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:17:57,929 INFO L82 PathProgramCache]: Analyzing trace with hash 946570758, now seen corresponding path program 30 times [2021-06-05 06:17:57,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:17:57,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646676272] [2021-06-05 06:17:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:17:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:17:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:58,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:17:58,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646676272] [2021-06-05 06:17:58,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646676272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:58,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655121782] [2021-06-05 06:17:58,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:17:58,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:17:58,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:17:58,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:17:58,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:17:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:17:58,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:58,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:17:58,368 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:17:58,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:17:58,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:17:58,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:17:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:17:58,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655121782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:17:58,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:17:58,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 06:17:58,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726439852] [2021-06-05 06:17:58,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:17:58,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:17:58,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:17:58,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:17:58,436 INFO L87 Difference]: Start difference. First operand 5723 states and 19454 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:01,587 INFO L93 Difference]: Finished difference Result 7729 states and 25674 transitions. [2021-06-05 06:18:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:18:01,588 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:01,599 INFO L225 Difference]: With dead ends: 7729 [2021-06-05 06:18:01,599 INFO L226 Difference]: Without dead ends: 7704 [2021-06-05 06:18:01,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2668.4ms TimeCoverageRelationStatistics Valid=615, Invalid=4077, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:18:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7704 states. [2021-06-05 06:18:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7704 to 5705. [2021-06-05 06:18:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5704 states have (on average 3.399193548387097) internal successors, (19389), 5704 states have internal predecessors, (19389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 19389 transitions. [2021-06-05 06:18:01,689 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 19389 transitions. Word has length 30 [2021-06-05 06:18:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:01,689 INFO L482 AbstractCegarLoop]: Abstraction has 5705 states and 19389 transitions. [2021-06-05 06:18:01,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 19389 transitions. [2021-06-05 06:18:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:01,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:01,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:01,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 06:18:01,896 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2078010192, now seen corresponding path program 31 times [2021-06-05 06:18:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:01,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294416209] [2021-06-05 06:18:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:02,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:02,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294416209] [2021-06-05 06:18:02,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294416209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:02,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788509301] [2021-06-05 06:18:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:02,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:02,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:02,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:18:02,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:18:02,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:02,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:02,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:02,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:18:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788509301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:02,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:02,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:18:02,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777116823] [2021-06-05 06:18:02,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:18:02,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:18:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:18:02,390 INFO L87 Difference]: Start difference. First operand 5705 states and 19389 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:04,532 INFO L93 Difference]: Finished difference Result 7595 states and 25322 transitions. [2021-06-05 06:18:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:18:04,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:04,548 INFO L225 Difference]: With dead ends: 7595 [2021-06-05 06:18:04,548 INFO L226 Difference]: Without dead ends: 7580 [2021-06-05 06:18:04,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1691.4ms TimeCoverageRelationStatistics Valid=427, Invalid=2543, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:18:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7580 states. [2021-06-05 06:18:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7580 to 5709. [2021-06-05 06:18:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.399614576033637) internal successors, (19405), 5708 states have internal predecessors, (19405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 19405 transitions. [2021-06-05 06:18:04,673 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 19405 transitions. Word has length 30 [2021-06-05 06:18:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:04,673 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 19405 transitions. [2021-06-05 06:18:04,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 19405 transitions. [2021-06-05 06:18:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:04,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:04,682 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:04,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 06:18:04,905 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:04,905 INFO L82 PathProgramCache]: Analyzing trace with hash -272462056, now seen corresponding path program 32 times [2021-06-05 06:18:04,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:04,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541881719] [2021-06-05 06:18:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:05,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:05,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541881719] [2021-06-05 06:18:05,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541881719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:05,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357637365] [2021-06-05 06:18:05,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:05,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:05,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:05,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:18:05,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:05,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:05,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:18:05,375 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:18:05,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:05,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:05,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:18:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:05,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357637365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:05,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:05,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:18:05,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920662475] [2021-06-05 06:18:05,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:18:05,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:18:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:18:05,445 INFO L87 Difference]: Start difference. First operand 5709 states and 19405 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:09,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:09,060 INFO L93 Difference]: Finished difference Result 8496 states and 28174 transitions. [2021-06-05 06:18:09,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 06:18:09,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:09,073 INFO L225 Difference]: With dead ends: 8496 [2021-06-05 06:18:09,073 INFO L226 Difference]: Without dead ends: 8471 [2021-06-05 06:18:09,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 3173.9ms TimeCoverageRelationStatistics Valid=835, Invalid=5171, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:18:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8471 states. [2021-06-05 06:18:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8471 to 5694. [2021-06-05 06:18:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3990865975759705) internal successors, (19351), 5693 states have internal predecessors, (19351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19351 transitions. [2021-06-05 06:18:09,175 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19351 transitions. Word has length 30 [2021-06-05 06:18:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:09,175 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19351 transitions. [2021-06-05 06:18:09,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19351 transitions. [2021-06-05 06:18:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:09,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:09,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:09,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 06:18:09,383 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:09,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1633979309, now seen corresponding path program 30 times [2021-06-05 06:18:09,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:09,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250858084] [2021-06-05 06:18:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:09,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:09,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250858084] [2021-06-05 06:18:09,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250858084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:09,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64361063] [2021-06-05 06:18:09,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:09,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:18:09,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:09,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:09,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:18:09,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:18:09,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:09,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:09,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:38 [2021-06-05 06:18:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:09,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64361063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:09,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:09,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-06-05 06:18:09,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182439945] [2021-06-05 06:18:09,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:18:09,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:09,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:18:09,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:18:09,787 INFO L87 Difference]: Start difference. First operand 5694 states and 19351 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:10,567 INFO L93 Difference]: Finished difference Result 7140 states and 23704 transitions. [2021-06-05 06:18:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:18:10,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:10,582 INFO L225 Difference]: With dead ends: 7140 [2021-06-05 06:18:10,582 INFO L226 Difference]: Without dead ends: 7002 [2021-06-05 06:18:10,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:18:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7002 states. [2021-06-05 06:18:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7002 to 5718. [2021-06-05 06:18:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 3.3998600664684275) internal successors, (19437), 5717 states have internal predecessors, (19437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 19437 transitions. [2021-06-05 06:18:10,661 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 19437 transitions. Word has length 30 [2021-06-05 06:18:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:10,661 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 19437 transitions. [2021-06-05 06:18:10,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 19437 transitions. [2021-06-05 06:18:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:10,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:10,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:10,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 06:18:10,868 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash -679268830, now seen corresponding path program 33 times [2021-06-05 06:18:10,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:10,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604524674] [2021-06-05 06:18:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:11,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:11,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604524674] [2021-06-05 06:18:11,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604524674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061034866] [2021-06-05 06:18:11,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:11,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:18:11,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:11,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:18:11,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:11,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:11,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:11,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:18:11,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:11,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:11,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:11,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-06-05 06:18:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:11,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061034866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:11,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:11,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 06:18:11,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412696707] [2021-06-05 06:18:11,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:18:11,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:11,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:18:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:18:11,701 INFO L87 Difference]: Start difference. First operand 5718 states and 19437 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:12,605 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 06:18:13,093 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 06:18:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:14,044 INFO L93 Difference]: Finished difference Result 8751 states and 28822 transitions. [2021-06-05 06:18:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:18:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:14,057 INFO L225 Difference]: With dead ends: 8751 [2021-06-05 06:18:14,057 INFO L226 Difference]: Without dead ends: 8725 [2021-06-05 06:18:14,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1944.1ms TimeCoverageRelationStatistics Valid=379, Invalid=2483, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:18:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8725 states. [2021-06-05 06:18:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8725 to 5809. [2021-06-05 06:18:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 5808 states have (on average 3.4013429752066116) internal successors, (19755), 5808 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 19755 transitions. [2021-06-05 06:18:14,160 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 19755 transitions. Word has length 30 [2021-06-05 06:18:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:14,160 INFO L482 AbstractCegarLoop]: Abstraction has 5809 states and 19755 transitions. [2021-06-05 06:18:14,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 19755 transitions. [2021-06-05 06:18:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:14,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:14,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:14,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:14,368 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:14,368 INFO L82 PathProgramCache]: Analyzing trace with hash -190748142, now seen corresponding path program 34 times [2021-06-05 06:18:14,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:14,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959710139] [2021-06-05 06:18:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:14,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:14,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959710139] [2021-06-05 06:18:14,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959710139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:14,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091868321] [2021-06-05 06:18:14,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:14,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:18:14,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:14,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:14,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:18:14,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:18:14,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:14,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:14,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:14,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:18:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:14,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091868321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:14,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:14,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:18:14,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891773563] [2021-06-05 06:18:14,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:18:14,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:14,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:18:14,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:18:14,821 INFO L87 Difference]: Start difference. First operand 5809 states and 19755 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:16,963 INFO L93 Difference]: Finished difference Result 10525 states and 34115 transitions. [2021-06-05 06:18:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:18:16,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:16,980 INFO L225 Difference]: With dead ends: 10525 [2021-06-05 06:18:16,980 INFO L226 Difference]: Without dead ends: 10504 [2021-06-05 06:18:16,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1594.7ms TimeCoverageRelationStatistics Valid=552, Invalid=3870, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:18:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10504 states. [2021-06-05 06:18:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10504 to 5873. [2021-06-05 06:18:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5872 states have (on average 3.403440054495913) internal successors, (19985), 5872 states have internal predecessors, (19985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 19985 transitions. [2021-06-05 06:18:17,113 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 19985 transitions. Word has length 30 [2021-06-05 06:18:17,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:17,113 INFO L482 AbstractCegarLoop]: Abstraction has 5873 states and 19985 transitions. [2021-06-05 06:18:17,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 19985 transitions. [2021-06-05 06:18:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:17,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:17,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:17,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:17,325 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:17,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2047177872, now seen corresponding path program 35 times [2021-06-05 06:18:17,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:17,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464849588] [2021-06-05 06:18:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:17,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:17,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464849588] [2021-06-05 06:18:17,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464849588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:17,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217755562] [2021-06-05 06:18:17,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:17,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:18:17,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:17,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:18:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:17,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:17,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:18:17,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:18:17,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:17,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:17,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:17,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:18:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:17,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217755562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:17,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:17,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:18:17,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297668063] [2021-06-05 06:18:17,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:18:17,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:18:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:18:17,864 INFO L87 Difference]: Start difference. First operand 5873 states and 19985 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:19,341 INFO L93 Difference]: Finished difference Result 9687 states and 31917 transitions. [2021-06-05 06:18:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:18:19,341 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:19,357 INFO L225 Difference]: With dead ends: 9687 [2021-06-05 06:18:19,357 INFO L226 Difference]: Without dead ends: 9666 [2021-06-05 06:18:19,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1198.6ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:18:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-06-05 06:18:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 5903. [2021-06-05 06:18:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5903 states, 5902 states have (on average 3.4056252117926125) internal successors, (20100), 5902 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5903 states to 5903 states and 20100 transitions. [2021-06-05 06:18:19,454 INFO L78 Accepts]: Start accepts. Automaton has 5903 states and 20100 transitions. Word has length 30 [2021-06-05 06:18:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:19,454 INFO L482 AbstractCegarLoop]: Abstraction has 5903 states and 20100 transitions. [2021-06-05 06:18:19,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5903 states and 20100 transitions. [2021-06-05 06:18:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:19,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:19,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:19,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:19,661 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:19,662 INFO L82 PathProgramCache]: Analyzing trace with hash -274070036, now seen corresponding path program 36 times [2021-06-05 06:18:19,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:19,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196793323] [2021-06-05 06:18:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:19,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:19,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196793323] [2021-06-05 06:18:19,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196793323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:19,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379364712] [2021-06-05 06:18:19,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:19,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:18:19,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:19,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:20,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:20,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:20,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:18:20,084 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:18:20,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:20,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:20,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:18:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:20,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379364712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:20,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:20,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:18:20,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808056229] [2021-06-05 06:18:20,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:18:20,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:18:20,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:18:20,142 INFO L87 Difference]: Start difference. First operand 5903 states and 20100 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:22,397 INFO L93 Difference]: Finished difference Result 10523 states and 34450 transitions. [2021-06-05 06:18:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:18:22,397 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:22,414 INFO L225 Difference]: With dead ends: 10523 [2021-06-05 06:18:22,415 INFO L226 Difference]: Without dead ends: 10456 [2021-06-05 06:18:22,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1783.9ms TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:18:22,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10456 states. [2021-06-05 06:18:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10456 to 5965. [2021-06-05 06:18:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5965 states, 5964 states have (on average 3.416834339369551) internal successors, (20378), 5964 states have internal predecessors, (20378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5965 states to 5965 states and 20378 transitions. [2021-06-05 06:18:22,532 INFO L78 Accepts]: Start accepts. Automaton has 5965 states and 20378 transitions. Word has length 30 [2021-06-05 06:18:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:22,532 INFO L482 AbstractCegarLoop]: Abstraction has 5965 states and 20378 transitions. [2021-06-05 06:18:22,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:22,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5965 states and 20378 transitions. [2021-06-05 06:18:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:22,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:22,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:22,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-05 06:18:22,740 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:22,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:22,740 INFO L82 PathProgramCache]: Analyzing trace with hash 87027730, now seen corresponding path program 37 times [2021-06-05 06:18:22,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:22,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613598738] [2021-06-05 06:18:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:22,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:22,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613598738] [2021-06-05 06:18:22,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613598738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:22,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706956698] [2021-06-05 06:18:22,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:22,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:23,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:23,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:23,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:23,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:18:23,144 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:18:23,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:23,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:23,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:18:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:23,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706956698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:23,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:23,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:18:23,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231803942] [2021-06-05 06:18:23,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:18:23,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:23,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:18:23,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:18:23,218 INFO L87 Difference]: Start difference. First operand 5965 states and 20378 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:24,474 INFO L93 Difference]: Finished difference Result 9182 states and 30455 transitions. [2021-06-05 06:18:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:18:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:24,489 INFO L225 Difference]: With dead ends: 9182 [2021-06-05 06:18:24,489 INFO L226 Difference]: Without dead ends: 9105 [2021-06-05 06:18:24,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 996.7ms TimeCoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:18:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-06-05 06:18:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 5990. [2021-06-05 06:18:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 3.418600768074804) internal successors, (20474), 5989 states have internal predecessors, (20474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 20474 transitions. [2021-06-05 06:18:24,594 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 20474 transitions. Word has length 30 [2021-06-05 06:18:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:24,594 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 20474 transitions. [2021-06-05 06:18:24,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 20474 transitions. [2021-06-05 06:18:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:24,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:24,603 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:24,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 06:18:24,803 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:24,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:24,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2029342979, now seen corresponding path program 31 times [2021-06-05 06:18:24,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:24,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897996415] [2021-06-05 06:18:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:24,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:24,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897996415] [2021-06-05 06:18:24,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897996415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:24,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352981481] [2021-06-05 06:18:24,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:18:24,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:25,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:18:25,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:25,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:25,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:25,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 06:18:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:25,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352981481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:25,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:25,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:18:25,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348680347] [2021-06-05 06:18:25,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:18:25,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:25,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:18:25,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:18:25,060 INFO L87 Difference]: Start difference. First operand 5990 states and 20474 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:25,215 INFO L93 Difference]: Finished difference Result 6518 states and 22032 transitions. [2021-06-05 06:18:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:18:25,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:25,225 INFO L225 Difference]: With dead ends: 6518 [2021-06-05 06:18:25,225 INFO L226 Difference]: Without dead ends: 6449 [2021-06-05 06:18:25,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:18:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-06-05 06:18:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 6000. [2021-06-05 06:18:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 5999 states have (on average 3.4140690115019168) internal successors, (20481), 5999 states have internal predecessors, (20481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 20481 transitions. [2021-06-05 06:18:25,306 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 20481 transitions. Word has length 30 [2021-06-05 06:18:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:25,306 INFO L482 AbstractCegarLoop]: Abstraction has 6000 states and 20481 transitions. [2021-06-05 06:18:25,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 20481 transitions. [2021-06-05 06:18:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:25,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:25,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:25,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 06:18:25,513 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash -824418271, now seen corresponding path program 32 times [2021-06-05 06:18:25,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:25,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359795797] [2021-06-05 06:18:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:25,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:25,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359795797] [2021-06-05 06:18:25,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359795797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:25,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427958937] [2021-06-05 06:18:25,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:25,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:25,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:25,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:25,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:25,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:25,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 06:18:25,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:18:25,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:25,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:25,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:46 [2021-06-05 06:18:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:26,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427958937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:26,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:26,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 21 [2021-06-05 06:18:26,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682696080] [2021-06-05 06:18:26,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:18:26,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:18:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:18:26,015 INFO L87 Difference]: Start difference. First operand 6000 states and 20481 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:26,925 INFO L93 Difference]: Finished difference Result 6705 states and 22557 transitions. [2021-06-05 06:18:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:18:26,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:26,935 INFO L225 Difference]: With dead ends: 6705 [2021-06-05 06:18:26,935 INFO L226 Difference]: Without dead ends: 6643 [2021-06-05 06:18:26,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 749.1ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:18:26,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2021-06-05 06:18:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6010. [2021-06-05 06:18:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 3.412880678981528) internal successors, (20508), 6009 states have internal predecessors, (20508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 20508 transitions. [2021-06-05 06:18:27,018 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 20508 transitions. Word has length 30 [2021-06-05 06:18:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:27,018 INFO L482 AbstractCegarLoop]: Abstraction has 6010 states and 20508 transitions. [2021-06-05 06:18:27,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 20508 transitions. [2021-06-05 06:18:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:27,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:27,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:27,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:27,229 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash -767713039, now seen corresponding path program 33 times [2021-06-05 06:18:27,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:27,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225182668] [2021-06-05 06:18:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:27,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:27,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225182668] [2021-06-05 06:18:27,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225182668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:27,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079459074] [2021-06-05 06:18:27,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:27,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:18:27,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:18:27,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:27,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:27,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:18:27,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:18:27,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:27,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:27,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:139 [2021-06-05 06:18:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:27,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079459074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:27,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:27,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 24 [2021-06-05 06:18:27,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492646140] [2021-06-05 06:18:27,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:18:27,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:27,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:18:27,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:18:27,909 INFO L87 Difference]: Start difference. First operand 6010 states and 20508 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:29,354 INFO L93 Difference]: Finished difference Result 6764 states and 22726 transitions. [2021-06-05 06:18:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:18:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:29,364 INFO L225 Difference]: With dead ends: 6764 [2021-06-05 06:18:29,365 INFO L226 Difference]: Without dead ends: 6734 [2021-06-05 06:18:29,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1161.6ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:18:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-06-05 06:18:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 6038. [2021-06-05 06:18:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6038 states, 6037 states have (on average 3.4132847440781844) internal successors, (20606), 6037 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 20606 transitions. [2021-06-05 06:18:29,447 INFO L78 Accepts]: Start accepts. Automaton has 6038 states and 20606 transitions. Word has length 30 [2021-06-05 06:18:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:29,447 INFO L482 AbstractCegarLoop]: Abstraction has 6038 states and 20606 transitions. [2021-06-05 06:18:29,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:29,448 INFO L276 IsEmpty]: Start isEmpty. Operand 6038 states and 20606 transitions. [2021-06-05 06:18:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:29,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:29,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:29,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 06:18:29,655 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash 864921772, now seen corresponding path program 38 times [2021-06-05 06:18:29,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:29,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828735314] [2021-06-05 06:18:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:30,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:30,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828735314] [2021-06-05 06:18:30,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828735314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:30,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626242830] [2021-06-05 06:18:30,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:30,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:30,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:18:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:30,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:30,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:30,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:18:30,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:30,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:30,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:30,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-06-05 06:18:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:30,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626242830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:30,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:30,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 06:18:30,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445923857] [2021-06-05 06:18:30,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:18:30,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:18:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:18:30,417 INFO L87 Difference]: Start difference. First operand 6038 states and 20606 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:32,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:32,207 INFO L93 Difference]: Finished difference Result 7697 states and 25628 transitions. [2021-06-05 06:18:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:18:32,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:32,219 INFO L225 Difference]: With dead ends: 7697 [2021-06-05 06:18:32,219 INFO L226 Difference]: Without dead ends: 7671 [2021-06-05 06:18:32,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1577.8ms TimeCoverageRelationStatistics Valid=327, Invalid=2025, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:18:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2021-06-05 06:18:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 6056. [2021-06-05 06:18:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6056 states, 6055 states have (on average 3.4123864574731626) internal successors, (20662), 6055 states have internal predecessors, (20662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 20662 transitions. [2021-06-05 06:18:32,306 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 20662 transitions. Word has length 30 [2021-06-05 06:18:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:32,306 INFO L482 AbstractCegarLoop]: Abstraction has 6056 states and 20662 transitions. [2021-06-05 06:18:32,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 20662 transitions. [2021-06-05 06:18:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:32,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:32,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:32,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 06:18:32,513 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -109421332, now seen corresponding path program 39 times [2021-06-05 06:18:32,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:32,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505726204] [2021-06-05 06:18:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:32,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:32,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505726204] [2021-06-05 06:18:32,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505726204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:32,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102240027] [2021-06-05 06:18:32,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:32,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:18:32,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:32,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:18:32,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:33,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:33,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 06:18:33,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:18:33,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:33,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:33,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:158 [2021-06-05 06:18:33,324 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 06:18:33,579 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 06:18:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:33,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102240027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:33,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:33,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:18:33,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024620201] [2021-06-05 06:18:33,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:18:33,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:18:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:18:33,762 INFO L87 Difference]: Start difference. First operand 6056 states and 20662 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:35,022 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 06:18:35,298 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 06:18:36,521 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-06-05 06:18:36,727 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 06:18:37,072 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2021-06-05 06:18:37,730 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-06-05 06:18:37,930 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 06:18:38,180 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 06:18:38,462 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-06-05 06:18:38,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:38,657 INFO L93 Difference]: Finished difference Result 8480 states and 28186 transitions. [2021-06-05 06:18:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:18:38,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:38,670 INFO L225 Difference]: With dead ends: 8480 [2021-06-05 06:18:38,670 INFO L226 Difference]: Without dead ends: 8427 [2021-06-05 06:18:38,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 4502.7ms TimeCoverageRelationStatistics Valid=629, Invalid=4483, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:18:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8427 states. [2021-06-05 06:18:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8427 to 6099. [2021-06-05 06:18:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 6098 states have (on average 3.4137422105608395) internal successors, (20817), 6098 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 20817 transitions. [2021-06-05 06:18:38,772 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 20817 transitions. Word has length 30 [2021-06-05 06:18:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:38,772 INFO L482 AbstractCegarLoop]: Abstraction has 6099 states and 20817 transitions. [2021-06-05 06:18:38,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 20817 transitions. [2021-06-05 06:18:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:38,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:38,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:38,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:38,980 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:38,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:38,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2040035028, now seen corresponding path program 40 times [2021-06-05 06:18:38,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:38,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425434584] [2021-06-05 06:18:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:39,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:39,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425434584] [2021-06-05 06:18:39,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425434584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:39,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973272388] [2021-06-05 06:18:39,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:39,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:18:39,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:39,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:18:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:39,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:18:39,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:18:39,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:39,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:39,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:39,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:18:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:39,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973272388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:39,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:39,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:18:39,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089369785] [2021-06-05 06:18:39,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:18:39,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:18:39,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:18:39,637 INFO L87 Difference]: Start difference. First operand 6099 states and 20817 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:41,395 INFO L93 Difference]: Finished difference Result 7457 states and 24976 transitions. [2021-06-05 06:18:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:18:41,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:41,405 INFO L225 Difference]: With dead ends: 7457 [2021-06-05 06:18:41,405 INFO L226 Difference]: Without dead ends: 7438 [2021-06-05 06:18:41,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1501.1ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:18:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2021-06-05 06:18:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 6101. [2021-06-05 06:18:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6101 states, 6100 states have (on average 3.4137704918032785) internal successors, (20824), 6100 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6101 states to 6101 states and 20824 transitions. [2021-06-05 06:18:41,489 INFO L78 Accepts]: Start accepts. Automaton has 6101 states and 20824 transitions. Word has length 30 [2021-06-05 06:18:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:41,490 INFO L482 AbstractCegarLoop]: Abstraction has 6101 states and 20824 transitions. [2021-06-05 06:18:41,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 6101 states and 20824 transitions. [2021-06-05 06:18:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:41,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:41,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:41,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:41,706 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1418323052, now seen corresponding path program 41 times [2021-06-05 06:18:41,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:41,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756991082] [2021-06-05 06:18:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:41,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:41,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756991082] [2021-06-05 06:18:41,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756991082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:41,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809496505] [2021-06-05 06:18:41,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:41,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:18:41,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:41,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:18:41,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:42,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:42,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:18:42,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:18:42,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:18:42,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:42,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:42,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:18:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:42,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809496505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:42,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:42,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:18:42,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292741830] [2021-06-05 06:18:42,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:18:42,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:42,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:18:42,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:18:42,302 INFO L87 Difference]: Start difference. First operand 6101 states and 20824 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:43,894 INFO L93 Difference]: Finished difference Result 9244 states and 30770 transitions. [2021-06-05 06:18:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:18:43,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:43,910 INFO L225 Difference]: With dead ends: 9244 [2021-06-05 06:18:43,910 INFO L226 Difference]: Without dead ends: 9223 [2021-06-05 06:18:43,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1208.7ms TimeCoverageRelationStatistics Valid=330, Invalid=1926, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:18:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9223 states. [2021-06-05 06:18:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9223 to 6163. [2021-06-05 06:18:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6162 states have (on average 3.4138266796494645) internal successors, (21036), 6162 states have internal predecessors, (21036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 21036 transitions. [2021-06-05 06:18:44,031 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 21036 transitions. Word has length 30 [2021-06-05 06:18:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:44,032 INFO L482 AbstractCegarLoop]: Abstraction has 6163 states and 21036 transitions. [2021-06-05 06:18:44,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 21036 transitions. [2021-06-05 06:18:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:44,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:44,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:44,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 06:18:44,240 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1342440280, now seen corresponding path program 42 times [2021-06-05 06:18:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:44,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808687415] [2021-06-05 06:18:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:44,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:44,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808687415] [2021-06-05 06:18:44,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808687415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:44,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18894483] [2021-06-05 06:18:44,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:44,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:18:44,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:44,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:44,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:44,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:18:44,795 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:18:44,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:44,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:44,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:18:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:44,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18894483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:44,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:44,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 06:18:44,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529323747] [2021-06-05 06:18:44,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:18:44,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:44,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:18:44,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:18:44,851 INFO L87 Difference]: Start difference. First operand 6163 states and 21036 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:47,064 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 06:18:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:48,479 INFO L93 Difference]: Finished difference Result 9714 states and 31902 transitions. [2021-06-05 06:18:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 06:18:48,479 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:48,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:48,494 INFO L225 Difference]: With dead ends: 9714 [2021-06-05 06:18:48,494 INFO L226 Difference]: Without dead ends: 9659 [2021-06-05 06:18:48,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 2979.1ms TimeCoverageRelationStatistics Valid=815, Invalid=6157, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 06:18:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2021-06-05 06:18:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 6173. [2021-06-05 06:18:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6173 states, 6172 states have (on average 3.4149384316267013) internal successors, (21077), 6172 states have internal predecessors, (21077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 21077 transitions. [2021-06-05 06:18:48,596 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 21077 transitions. Word has length 30 [2021-06-05 06:18:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:48,596 INFO L482 AbstractCegarLoop]: Abstraction has 6173 states and 21077 transitions. [2021-06-05 06:18:48,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:48,596 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 21077 transitions. [2021-06-05 06:18:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:48,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:48,603 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:48,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:48,803 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1284214256, now seen corresponding path program 43 times [2021-06-05 06:18:48,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:48,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830047112] [2021-06-05 06:18:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:49,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:49,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830047112] [2021-06-05 06:18:49,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830047112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:49,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696327200] [2021-06-05 06:18:49,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:18:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:49,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:49,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:49,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:18:49,328 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:18:49,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:49,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:49,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:18:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:49,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696327200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:49,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:49,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:18:49,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118172475] [2021-06-05 06:18:49,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:18:49,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:18:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:18:49,401 INFO L87 Difference]: Start difference. First operand 6173 states and 21077 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:50,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:50,680 INFO L93 Difference]: Finished difference Result 9307 states and 30934 transitions. [2021-06-05 06:18:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:18:50,680 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:50,694 INFO L225 Difference]: With dead ends: 9307 [2021-06-05 06:18:50,694 INFO L226 Difference]: Without dead ends: 9230 [2021-06-05 06:18:50,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1059.7ms TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:18:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9230 states. [2021-06-05 06:18:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9230 to 6160. [2021-06-05 06:18:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 3.4159766195811008) internal successors, (21039), 6159 states have internal predecessors, (21039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 21039 transitions. [2021-06-05 06:18:50,796 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 21039 transitions. Word has length 30 [2021-06-05 06:18:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:50,796 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 21039 transitions. [2021-06-05 06:18:50,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 21039 transitions. [2021-06-05 06:18:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:50,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:50,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:51,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 06:18:51,004 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:51,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1930370840, now seen corresponding path program 44 times [2021-06-05 06:18:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:51,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239853448] [2021-06-05 06:18:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:51,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:51,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239853448] [2021-06-05 06:18:51,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239853448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:51,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517569411] [2021-06-05 06:18:51,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:51,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:18:51,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:18:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:51,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:51,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:51,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:51,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:18:51,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:51,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 06:18:51,578 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:18:51,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:51,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:51,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 06:18:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:51,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517569411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:51,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:51,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:18:51,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610016464] [2021-06-05 06:18:51,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:18:51,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:51,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:18:51,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:18:51,662 INFO L87 Difference]: Start difference. First operand 6160 states and 21039 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:18:55,286 INFO L93 Difference]: Finished difference Result 10757 states and 35501 transitions. [2021-06-05 06:18:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:18:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:18:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:18:55,303 INFO L225 Difference]: With dead ends: 10757 [2021-06-05 06:18:55,303 INFO L226 Difference]: Without dead ends: 10710 [2021-06-05 06:18:55,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2773.7ms TimeCoverageRelationStatistics Valid=765, Invalid=5397, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:18:55,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-06-05 06:18:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 6165. [2021-06-05 06:18:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6165 states, 6164 states have (on average 3.416288124594419) internal successors, (21058), 6164 states have internal predecessors, (21058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6165 states to 6165 states and 21058 transitions. [2021-06-05 06:18:55,442 INFO L78 Accepts]: Start accepts. Automaton has 6165 states and 21058 transitions. Word has length 30 [2021-06-05 06:18:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:18:55,442 INFO L482 AbstractCegarLoop]: Abstraction has 6165 states and 21058 transitions. [2021-06-05 06:18:55,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:18:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6165 states and 21058 transitions. [2021-06-05 06:18:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:18:55,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:18:55,449 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:18:55,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:55,650 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:18:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:18:55,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1586753244, now seen corresponding path program 45 times [2021-06-05 06:18:55,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:18:55,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395390336] [2021-06-05 06:18:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:18:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:18:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:55,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:18:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395390336] [2021-06-05 06:18:55,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395390336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795159740] [2021-06-05 06:18:55,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:18:56,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:18:56,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:18:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:18:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:18:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:18:56,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:56,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:18:56,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:18:56,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:18:56,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:18:56,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-06-05 06:18:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:18:56,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795159740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:18:56,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:18:56,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 06:18:56,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677232463] [2021-06-05 06:18:56,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:18:56,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:18:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:18:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:18:56,418 INFO L87 Difference]: Start difference. First operand 6165 states and 21058 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:00,797 INFO L93 Difference]: Finished difference Result 8909 states and 29416 transitions. [2021-06-05 06:19:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:19:00,797 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:00,811 INFO L225 Difference]: With dead ends: 8909 [2021-06-05 06:19:00,811 INFO L226 Difference]: Without dead ends: 8853 [2021-06-05 06:19:00,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 3434.3ms TimeCoverageRelationStatistics Valid=579, Invalid=5583, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:19:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-06-05 06:19:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6186. [2021-06-05 06:19:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 3.4202101859337106) internal successors, (21154), 6185 states have internal predecessors, (21154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 21154 transitions. [2021-06-05 06:19:00,924 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 21154 transitions. Word has length 30 [2021-06-05 06:19:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:00,924 INFO L482 AbstractCegarLoop]: Abstraction has 6186 states and 21154 transitions. [2021-06-05 06:19:00,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 21154 transitions. [2021-06-05 06:19:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:00,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:00,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:01,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 06:19:01,132 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash -181911884, now seen corresponding path program 46 times [2021-06-05 06:19:01,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:01,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017644412] [2021-06-05 06:19:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:01,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:01,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017644412] [2021-06-05 06:19:01,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017644412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:01,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492670569] [2021-06-05 06:19:01,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:01,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:19:01,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:01,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:19:01,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:01,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:01,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:19:01,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:01,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:01,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:01,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:19:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:01,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492670569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:01,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:01,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:19:01,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304834946] [2021-06-05 06:19:01,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:19:01,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:01,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:19:01,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:19:01,733 INFO L87 Difference]: Start difference. First operand 6186 states and 21154 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:02,508 INFO L93 Difference]: Finished difference Result 7716 states and 26020 transitions. [2021-06-05 06:19:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:19:02,509 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:02,523 INFO L225 Difference]: With dead ends: 7716 [2021-06-05 06:19:02,523 INFO L226 Difference]: Without dead ends: 7695 [2021-06-05 06:19:02,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 682.2ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:19:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-06-05 06:19:02,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 6196. [2021-06-05 06:19:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.419693301049233) internal successors, (21185), 6195 states have internal predecessors, (21185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21185 transitions. [2021-06-05 06:19:02,628 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21185 transitions. Word has length 30 [2021-06-05 06:19:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:02,628 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21185 transitions. [2021-06-05 06:19:02,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21185 transitions. [2021-06-05 06:19:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:02,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:02,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:02,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 06:19:02,838 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1591195952, now seen corresponding path program 47 times [2021-06-05 06:19:02,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:02,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976924833] [2021-06-05 06:19:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:03,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:03,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976924833] [2021-06-05 06:19:03,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976924833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:03,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881117534] [2021-06-05 06:19:03,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:03,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:19:03,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:03,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:19:03,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:03,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:03,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:03,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:19:03,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:19:03,354 INFO L628 ElimStorePlain]: treesize reduction 24, result has 66.2 percent of original size [2021-06-05 06:19:03,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:19:03,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:66 [2021-06-05 06:19:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:03,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881117534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:03,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:03,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 06:19:03,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717368931] [2021-06-05 06:19:03,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:19:03,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:19:03,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:19:03,468 INFO L87 Difference]: Start difference. First operand 6196 states and 21185 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:04,326 INFO L93 Difference]: Finished difference Result 8660 states and 28972 transitions. [2021-06-05 06:19:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:19:04,327 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:04,341 INFO L225 Difference]: With dead ends: 8660 [2021-06-05 06:19:04,341 INFO L226 Difference]: Without dead ends: 8610 [2021-06-05 06:19:04,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 819.0ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:19:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8610 states. [2021-06-05 06:19:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8610 to 6247. [2021-06-05 06:19:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 6246 states have (on average 3.420268972142171) internal successors, (21363), 6246 states have internal predecessors, (21363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 21363 transitions. [2021-06-05 06:19:04,468 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 21363 transitions. Word has length 30 [2021-06-05 06:19:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:04,468 INFO L482 AbstractCegarLoop]: Abstraction has 6247 states and 21363 transitions. [2021-06-05 06:19:04,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 21363 transitions. [2021-06-05 06:19:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:04,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:04,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:04,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 06:19:04,677 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:04,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1439678622, now seen corresponding path program 48 times [2021-06-05 06:19:04,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:04,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183216583] [2021-06-05 06:19:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:04,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:04,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183216583] [2021-06-05 06:19:04,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183216583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:04,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384328573] [2021-06-05 06:19:04,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:05,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:19:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:19:05,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:05,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:05,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:05,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:19:05,199 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:19:05,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:05,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:05,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:19:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:05,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384328573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:05,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:05,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:19:05,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818288535] [2021-06-05 06:19:05,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:19:05,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:05,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:19:05,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:19:05,278 INFO L87 Difference]: Start difference. First operand 6247 states and 21363 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:05,870 INFO L93 Difference]: Finished difference Result 7945 states and 26808 transitions. [2021-06-05 06:19:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:19:05,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:05,883 INFO L225 Difference]: With dead ends: 7945 [2021-06-05 06:19:05,883 INFO L226 Difference]: Without dead ends: 7920 [2021-06-05 06:19:05,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 670.4ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:19:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2021-06-05 06:19:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 6228. [2021-06-05 06:19:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 3.421069535892083) internal successors, (21303), 6227 states have internal predecessors, (21303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 21303 transitions. [2021-06-05 06:19:05,989 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 21303 transitions. Word has length 30 [2021-06-05 06:19:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:05,989 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 21303 transitions. [2021-06-05 06:19:05,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 21303 transitions. [2021-06-05 06:19:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:05,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:05,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:06,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:06,198 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:06,198 INFO L82 PathProgramCache]: Analyzing trace with hash 603346348, now seen corresponding path program 49 times [2021-06-05 06:19:06,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:06,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347705649] [2021-06-05 06:19:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:06,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:06,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347705649] [2021-06-05 06:19:06,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347705649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:06,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610469006] [2021-06-05 06:19:06,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:06,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:19:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:06,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:06,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:06,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:19:06,682 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:19:06,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:06,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:06,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:19:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:06,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610469006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:06,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:06,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:19:06,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294435130] [2021-06-05 06:19:06,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:19:06,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:06,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:19:06,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:19:06,760 INFO L87 Difference]: Start difference. First operand 6228 states and 21303 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:07,567 INFO L93 Difference]: Finished difference Result 8032 states and 27059 transitions. [2021-06-05 06:19:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:19:07,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:07,582 INFO L225 Difference]: With dead ends: 8032 [2021-06-05 06:19:07,582 INFO L226 Difference]: Without dead ends: 8007 [2021-06-05 06:19:07,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 657.2ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:19:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8007 states. [2021-06-05 06:19:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8007 to 6224. [2021-06-05 06:19:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 3.421018801221276) internal successors, (21289), 6223 states have internal predecessors, (21289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 21289 transitions. [2021-06-05 06:19:07,697 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 21289 transitions. Word has length 30 [2021-06-05 06:19:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:07,697 INFO L482 AbstractCegarLoop]: Abstraction has 6224 states and 21289 transitions. [2021-06-05 06:19:07,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 21289 transitions. [2021-06-05 06:19:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:07,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:07,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:07,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 06:19:07,906 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:07,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:07,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1594721900, now seen corresponding path program 50 times [2021-06-05 06:19:07,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:07,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288550818] [2021-06-05 06:19:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:08,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:08,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288550818] [2021-06-05 06:19:08,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288550818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:08,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677144003] [2021-06-05 06:19:08,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:08,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:19:08,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:19:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:08,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:08,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:08,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:19:08,374 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:19:08,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:08,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:08,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:19:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:08,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677144003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:08,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:08,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:19:08,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601093734] [2021-06-05 06:19:08,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:19:08,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:08,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:19:08,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:19:08,450 INFO L87 Difference]: Start difference. First operand 6224 states and 21289 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:10,384 INFO L93 Difference]: Finished difference Result 8292 states and 27808 transitions. [2021-06-05 06:19:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:19:10,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:10,397 INFO L225 Difference]: With dead ends: 8292 [2021-06-05 06:19:10,397 INFO L226 Difference]: Without dead ends: 8267 [2021-06-05 06:19:10,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1512.0ms TimeCoverageRelationStatistics Valid=393, Invalid=2687, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:19:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-06-05 06:19:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 6232. [2021-06-05 06:19:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 3.4204782538918312) internal successors, (21313), 6231 states have internal predecessors, (21313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 21313 transitions. [2021-06-05 06:19:10,499 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 21313 transitions. Word has length 30 [2021-06-05 06:19:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:10,499 INFO L482 AbstractCegarLoop]: Abstraction has 6232 states and 21313 transitions. [2021-06-05 06:19:10,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 21313 transitions. [2021-06-05 06:19:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:10,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:10,506 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:10,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:10,707 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:10,707 INFO L82 PathProgramCache]: Analyzing trace with hash -55546536, now seen corresponding path program 51 times [2021-06-05 06:19:10,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:10,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992517943] [2021-06-05 06:19:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:10,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:10,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992517943] [2021-06-05 06:19:10,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992517943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:10,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687695832] [2021-06-05 06:19:10,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:10,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:19:10,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:10,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:19:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:11,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:11,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:11,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:19:11,158 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:19:11,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:11,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:11,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:19:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:11,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687695832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:11,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:11,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:19:11,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122977302] [2021-06-05 06:19:11,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:19:11,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:11,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:19:11,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:19:11,228 INFO L87 Difference]: Start difference. First operand 6232 states and 21313 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:13,175 INFO L93 Difference]: Finished difference Result 8261 states and 27817 transitions. [2021-06-05 06:19:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:19:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:13,188 INFO L225 Difference]: With dead ends: 8261 [2021-06-05 06:19:13,188 INFO L226 Difference]: Without dead ends: 8230 [2021-06-05 06:19:13,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1604.4ms TimeCoverageRelationStatistics Valid=463, Invalid=3077, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:19:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-06-05 06:19:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 6240. [2021-06-05 06:19:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6240 states, 6239 states have (on average 3.4199390928033337) internal successors, (21337), 6239 states have internal predecessors, (21337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6240 states to 6240 states and 21337 transitions. [2021-06-05 06:19:13,285 INFO L78 Accepts]: Start accepts. Automaton has 6240 states and 21337 transitions. Word has length 30 [2021-06-05 06:19:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:13,285 INFO L482 AbstractCegarLoop]: Abstraction has 6240 states and 21337 transitions. [2021-06-05 06:19:13,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6240 states and 21337 transitions. [2021-06-05 06:19:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:13,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:13,292 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:13,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 06:19:13,494 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:13,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1158696, now seen corresponding path program 52 times [2021-06-05 06:19:13,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:13,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383404393] [2021-06-05 06:19:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:13,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:13,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383404393] [2021-06-05 06:19:13,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383404393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:13,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447773187] [2021-06-05 06:19:13,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:13,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:19:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:13,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:19:13,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:13,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:13,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:19:13,974 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:19:13,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:13,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:13,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:19:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:14,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447773187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:14,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:14,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:19:14,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147259545] [2021-06-05 06:19:14,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:19:14,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:14,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:19:14,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:19:14,052 INFO L87 Difference]: Start difference. First operand 6240 states and 21337 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:14,910 INFO L93 Difference]: Finished difference Result 8082 states and 27204 transitions. [2021-06-05 06:19:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:19:14,911 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:14,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:14,923 INFO L225 Difference]: With dead ends: 8082 [2021-06-05 06:19:14,923 INFO L226 Difference]: Without dead ends: 8057 [2021-06-05 06:19:14,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:19:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2021-06-05 06:19:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 6248. [2021-06-05 06:19:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 3.4194013126300624) internal successors, (21361), 6247 states have internal predecessors, (21361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 21361 transitions. [2021-06-05 06:19:15,022 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 21361 transitions. Word has length 30 [2021-06-05 06:19:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:15,022 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 21361 transitions. [2021-06-05 06:19:15,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 21361 transitions. [2021-06-05 06:19:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:15,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:15,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:15,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:15,230 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:15,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1228760081, now seen corresponding path program 22 times [2021-06-05 06:19:15,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:15,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757721094] [2021-06-05 06:19:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:15,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:15,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757721094] [2021-06-05 06:19:15,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757721094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:15,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415488494] [2021-06-05 06:19:15,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:15,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:19:15,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:15,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:19:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:15,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:15,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:15,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:15,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:15,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:19:15,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:15,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:15,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:15,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:19:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:15,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415488494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:15,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:15,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 06:19:15,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966038802] [2021-06-05 06:19:15,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:19:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:15,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:19:15,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:19:15,847 INFO L87 Difference]: Start difference. First operand 6248 states and 21361 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:18,067 INFO L93 Difference]: Finished difference Result 7816 states and 26141 transitions. [2021-06-05 06:19:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:19:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:18,080 INFO L225 Difference]: With dead ends: 7816 [2021-06-05 06:19:18,080 INFO L226 Difference]: Without dead ends: 7790 [2021-06-05 06:19:18,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1889.4ms TimeCoverageRelationStatistics Valid=515, Invalid=3145, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:19:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-06-05 06:19:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6242. [2021-06-05 06:19:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 6241 states have (on average 3.4202852107034127) internal successors, (21346), 6241 states have internal predecessors, (21346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 21346 transitions. [2021-06-05 06:19:18,182 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 21346 transitions. Word has length 30 [2021-06-05 06:19:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:18,182 INFO L482 AbstractCegarLoop]: Abstraction has 6242 states and 21346 transitions. [2021-06-05 06:19:18,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 21346 transitions. [2021-06-05 06:19:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:18,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:18,189 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:18,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 06:19:18,390 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1051720055, now seen corresponding path program 23 times [2021-06-05 06:19:18,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:18,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222308767] [2021-06-05 06:19:18,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:18,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:18,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222308767] [2021-06-05 06:19:18,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222308767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:18,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906398066] [2021-06-05 06:19:18,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:18,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:19:18,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:18,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:19:18,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:18,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:18,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:18,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:18,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:19:18,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:18,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:18,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:18,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:19:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:18,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906398066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:18,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:18,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:19:18,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824893614] [2021-06-05 06:19:18,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:19:18,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:19:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:19:18,952 INFO L87 Difference]: Start difference. First operand 6242 states and 21346 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:20,828 INFO L93 Difference]: Finished difference Result 7732 states and 25924 transitions. [2021-06-05 06:19:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:19:20,829 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:20,841 INFO L225 Difference]: With dead ends: 7732 [2021-06-05 06:19:20,841 INFO L226 Difference]: Without dead ends: 7706 [2021-06-05 06:19:20,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1622.6ms TimeCoverageRelationStatistics Valid=529, Invalid=3253, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:19:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-06-05 06:19:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 6254. [2021-06-05 06:19:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6254 states, 6253 states have (on average 3.418519110826803) internal successors, (21376), 6253 states have internal predecessors, (21376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6254 states to 6254 states and 21376 transitions. [2021-06-05 06:19:20,935 INFO L78 Accepts]: Start accepts. Automaton has 6254 states and 21376 transitions. Word has length 30 [2021-06-05 06:19:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:20,935 INFO L482 AbstractCegarLoop]: Abstraction has 6254 states and 21376 transitions. [2021-06-05 06:19:20,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6254 states and 21376 transitions. [2021-06-05 06:19:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:20,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:20,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:21,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 06:19:21,146 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:21,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:21,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1089482637, now seen corresponding path program 24 times [2021-06-05 06:19:21,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:21,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560445072] [2021-06-05 06:19:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:21,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:21,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560445072] [2021-06-05 06:19:21,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560445072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:21,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260722788] [2021-06-05 06:19:21,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:21,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:19:21,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:19:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:21,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:21,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:21,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:21,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-06-05 06:19:21,705 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:19:21,720 INFO L628 ElimStorePlain]: treesize reduction 28, result has 39.1 percent of original size [2021-06-05 06:19:21,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:21,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:28 [2021-06-05 06:19:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:21,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260722788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:21,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:21,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:19:21,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16653903] [2021-06-05 06:19:21,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:19:21,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:21,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:19:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:19:21,797 INFO L87 Difference]: Start difference. First operand 6254 states and 21376 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:24,257 INFO L93 Difference]: Finished difference Result 8414 states and 28160 transitions. [2021-06-05 06:19:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:19:24,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:24,270 INFO L225 Difference]: With dead ends: 8414 [2021-06-05 06:19:24,270 INFO L226 Difference]: Without dead ends: 8388 [2021-06-05 06:19:24,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1981.5ms TimeCoverageRelationStatistics Valid=588, Invalid=3968, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:19:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2021-06-05 06:19:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 6316. [2021-06-05 06:19:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6316 states, 6315 states have (on average 3.4134600158353128) internal successors, (21556), 6315 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 21556 transitions. [2021-06-05 06:19:24,366 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 21556 transitions. Word has length 30 [2021-06-05 06:19:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:24,366 INFO L482 AbstractCegarLoop]: Abstraction has 6316 states and 21556 transitions. [2021-06-05 06:19:24,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:24,366 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 21556 transitions. [2021-06-05 06:19:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:24,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:24,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:24,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 06:19:24,574 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:24,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1630768673, now seen corresponding path program 25 times [2021-06-05 06:19:24,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:24,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023704579] [2021-06-05 06:19:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:24,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023704579] [2021-06-05 06:19:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023704579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671417632] [2021-06-05 06:19:24,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:19:24,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:25,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:25,227 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:19:25,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-06-05 06:19:25,230 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:25,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:25,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:25,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-06-05 06:19:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:25,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671417632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:25,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:25,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 06:19:25,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291102815] [2021-06-05 06:19:25,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:19:25,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:19:25,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:19:25,290 INFO L87 Difference]: Start difference. First operand 6316 states and 21556 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:27,391 INFO L93 Difference]: Finished difference Result 7885 states and 26351 transitions. [2021-06-05 06:19:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:19:27,391 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:27,404 INFO L225 Difference]: With dead ends: 7885 [2021-06-05 06:19:27,404 INFO L226 Difference]: Without dead ends: 7859 [2021-06-05 06:19:27,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1856.6ms TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:19:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2021-06-05 06:19:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 6324. [2021-06-05 06:19:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 6323 states have (on average 3.4123042859402184) internal successors, (21576), 6323 states have internal predecessors, (21576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 21576 transitions. [2021-06-05 06:19:27,502 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 21576 transitions. Word has length 30 [2021-06-05 06:19:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:27,502 INFO L482 AbstractCegarLoop]: Abstraction has 6324 states and 21576 transitions. [2021-06-05 06:19:27,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 21576 transitions. [2021-06-05 06:19:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:27,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:27,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:27,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:27,711 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2139112310, now seen corresponding path program 53 times [2021-06-05 06:19:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:27,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594158707] [2021-06-05 06:19:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:28,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594158707] [2021-06-05 06:19:28,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594158707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600092627] [2021-06-05 06:19:28,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:28,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:19:28,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:28,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:19:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:28,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:28,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:28,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:19:28,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:28,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:28,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:28,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 06:19:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:28,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600092627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:28,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:28,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-05 06:19:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627750638] [2021-06-05 06:19:28,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:19:28,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:28,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:19:28,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:19:28,281 INFO L87 Difference]: Start difference. First operand 6324 states and 21576 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:30,057 INFO L93 Difference]: Finished difference Result 7989 states and 26816 transitions. [2021-06-05 06:19:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:19:30,057 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:30,068 INFO L225 Difference]: With dead ends: 7989 [2021-06-05 06:19:30,069 INFO L226 Difference]: Without dead ends: 7968 [2021-06-05 06:19:30,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1499.1ms TimeCoverageRelationStatistics Valid=297, Invalid=1959, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:19:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2021-06-05 06:19:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 6356. [2021-06-05 06:19:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6356 states, 6355 states have (on average 3.411644374508261) internal successors, (21681), 6355 states have internal predecessors, (21681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6356 states to 6356 states and 21681 transitions. [2021-06-05 06:19:30,159 INFO L78 Accepts]: Start accepts. Automaton has 6356 states and 21681 transitions. Word has length 30 [2021-06-05 06:19:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:30,159 INFO L482 AbstractCegarLoop]: Abstraction has 6356 states and 21681 transitions. [2021-06-05 06:19:30,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 6356 states and 21681 transitions. [2021-06-05 06:19:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:30,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:30,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:30,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:30,367 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:30,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1940768934, now seen corresponding path program 54 times [2021-06-05 06:19:30,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:30,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091448569] [2021-06-05 06:19:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:30,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:30,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091448569] [2021-06-05 06:19:30,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091448569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:30,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667138204] [2021-06-05 06:19:30,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:30,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:19:30,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:30,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:19:30,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:30,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:30,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:30,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:19:30,826 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:19:30,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:30,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:30,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:19:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:30,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667138204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:30,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:30,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:19:30,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352623982] [2021-06-05 06:19:30,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:19:30,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:30,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:19:30,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:19:30,881 INFO L87 Difference]: Start difference. First operand 6356 states and 21681 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:32,986 INFO L93 Difference]: Finished difference Result 9388 states and 31190 transitions. [2021-06-05 06:19:32,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:19:32,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:32,999 INFO L225 Difference]: With dead ends: 9388 [2021-06-05 06:19:32,999 INFO L226 Difference]: Without dead ends: 9344 [2021-06-05 06:19:32,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1685.5ms TimeCoverageRelationStatistics Valid=481, Invalid=3059, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:19:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-06-05 06:19:33,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 6373. [2021-06-05 06:19:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.4110169491525424) internal successors, (21735), 6372 states have internal predecessors, (21735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21735 transitions. [2021-06-05 06:19:33,104 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21735 transitions. Word has length 30 [2021-06-05 06:19:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:33,104 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21735 transitions. [2021-06-05 06:19:33,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21735 transitions. [2021-06-05 06:19:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:33,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:33,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:33,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:33,313 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:33,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1538373058, now seen corresponding path program 55 times [2021-06-05 06:19:33,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:33,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664592717] [2021-06-05 06:19:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:33,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:33,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664592717] [2021-06-05 06:19:33,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664592717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:33,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791672611] [2021-06-05 06:19:33,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:33,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:19:33,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:33,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:33,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:33,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 06:19:33,812 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:19:33,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:33,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:33,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 06:19:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:33,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791672611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:33,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:33,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:19:33,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484810720] [2021-06-05 06:19:33,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:19:33,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:33,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:19:33,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:19:33,895 INFO L87 Difference]: Start difference. First operand 6373 states and 21735 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:35,509 INFO L93 Difference]: Finished difference Result 8603 states and 28835 transitions. [2021-06-05 06:19:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:19:35,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:35,524 INFO L225 Difference]: With dead ends: 8603 [2021-06-05 06:19:35,524 INFO L226 Difference]: Without dead ends: 8553 [2021-06-05 06:19:35,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1312.0ms TimeCoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:19:35,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8553 states. [2021-06-05 06:19:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8553 to 6375. [2021-06-05 06:19:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.411201757138375) internal successors, (21743), 6374 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21743 transitions. [2021-06-05 06:19:35,683 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21743 transitions. Word has length 30 [2021-06-05 06:19:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:35,683 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21743 transitions. [2021-06-05 06:19:35,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21743 transitions. [2021-06-05 06:19:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:35,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:35,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:35,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 06:19:35,892 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:35,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:35,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1512950702, now seen corresponding path program 56 times [2021-06-05 06:19:35,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:35,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781185542] [2021-06-05 06:19:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:36,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:36,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781185542] [2021-06-05 06:19:36,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781185542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:36,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298461380] [2021-06-05 06:19:36,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:36,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:19:36,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:19:36,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:36,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:36,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:36,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:19:36,389 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:19:36,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:36,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:36,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:19:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:36,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298461380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:36,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:36,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:19:36,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263835693] [2021-06-05 06:19:36,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:19:36,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:36,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:19:36,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:19:36,440 INFO L87 Difference]: Start difference. First operand 6375 states and 21743 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:37,331 INFO L93 Difference]: Finished difference Result 8550 states and 28635 transitions. [2021-06-05 06:19:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:19:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:37,344 INFO L225 Difference]: With dead ends: 8550 [2021-06-05 06:19:37,344 INFO L226 Difference]: Without dead ends: 8525 [2021-06-05 06:19:37,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 895.7ms TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:19:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-06-05 06:19:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 6366. [2021-06-05 06:19:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6366 states, 6365 states have (on average 3.4120974076983503) internal successors, (21718), 6365 states have internal predecessors, (21718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 21718 transitions. [2021-06-05 06:19:37,454 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 21718 transitions. Word has length 30 [2021-06-05 06:19:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:37,454 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 21718 transitions. [2021-06-05 06:19:37,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 21718 transitions. [2021-06-05 06:19:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:37,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:37,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:37,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 06:19:37,664 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1366348758, now seen corresponding path program 57 times [2021-06-05 06:19:37,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:37,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908239847] [2021-06-05 06:19:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:38,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:38,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908239847] [2021-06-05 06:19:38,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908239847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:38,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355606758] [2021-06-05 06:19:38,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:38,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:19:38,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:38,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:19:38,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:38,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:38,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 06:19:38,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:19:38,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:38,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:38,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:274 [2021-06-05 06:19:38,459 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 06:19:38,741 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 06:19:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:38,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355606758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:38,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:38,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 06:19:38,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73809990] [2021-06-05 06:19:38,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:19:38,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:38,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:19:38,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:19:38,885 INFO L87 Difference]: Start difference. First operand 6366 states and 21718 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:40,388 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 06:19:40,556 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-06-05 06:19:40,911 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 06:19:41,161 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 06:19:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:41,499 INFO L93 Difference]: Finished difference Result 8916 states and 29779 transitions. [2021-06-05 06:19:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:19:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:41,514 INFO L225 Difference]: With dead ends: 8916 [2021-06-05 06:19:41,514 INFO L226 Difference]: Without dead ends: 8853 [2021-06-05 06:19:41,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2481.4ms TimeCoverageRelationStatistics Valid=314, Invalid=2136, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:19:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-06-05 06:19:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6375. [2021-06-05 06:19:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.41214308126765) internal successors, (21749), 6374 states have internal predecessors, (21749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21749 transitions. [2021-06-05 06:19:41,614 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21749 transitions. Word has length 30 [2021-06-05 06:19:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:41,614 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21749 transitions. [2021-06-05 06:19:41,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21749 transitions. [2021-06-05 06:19:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:41,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:41,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:41,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:41,825 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:41,825 INFO L82 PathProgramCache]: Analyzing trace with hash 764161106, now seen corresponding path program 58 times [2021-06-05 06:19:41,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:41,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434642842] [2021-06-05 06:19:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:42,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:42,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434642842] [2021-06-05 06:19:42,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434642842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:42,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184795810] [2021-06-05 06:19:42,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:42,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:19:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:19:42,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:42,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:42,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:42,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:19:42,347 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:19:42,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:42,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:42,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:19:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:42,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184795810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:42,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:42,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 06:19:42,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061756967] [2021-06-05 06:19:42,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:19:42,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:42,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:19:42,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:19:42,426 INFO L87 Difference]: Start difference. First operand 6375 states and 21749 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:43,430 INFO L93 Difference]: Finished difference Result 8258 states and 27729 transitions. [2021-06-05 06:19:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:19:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:43,444 INFO L225 Difference]: With dead ends: 8258 [2021-06-05 06:19:43,444 INFO L226 Difference]: Without dead ends: 8233 [2021-06-05 06:19:43,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 850.9ms TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:19:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2021-06-05 06:19:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 6373. [2021-06-05 06:19:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.412272441933459) internal successors, (21743), 6372 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21743 transitions. [2021-06-05 06:19:43,547 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21743 transitions. Word has length 30 [2021-06-05 06:19:43,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:43,547 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21743 transitions. [2021-06-05 06:19:43,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:43,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21743 transitions. [2021-06-05 06:19:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:43,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:43,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:43,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:43,757 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash -175548318, now seen corresponding path program 59 times [2021-06-05 06:19:43,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:43,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738863751] [2021-06-05 06:19:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:44,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:44,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738863751] [2021-06-05 06:19:44,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738863751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:44,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261240439] [2021-06-05 06:19:44,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:44,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:19:44,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:44,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:19:44,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:44,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:44,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:44,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:19:44,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:44,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:44,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:44,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-06-05 06:19:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:44,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261240439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:44,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:44,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-05 06:19:44,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834566733] [2021-06-05 06:19:44,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:19:44,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:19:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:19:44,371 INFO L87 Difference]: Start difference. First operand 6373 states and 21743 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:46,968 INFO L93 Difference]: Finished difference Result 8585 states and 28565 transitions. [2021-06-05 06:19:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:19:46,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:46,983 INFO L225 Difference]: With dead ends: 8585 [2021-06-05 06:19:46,983 INFO L226 Difference]: Without dead ends: 8570 [2021-06-05 06:19:46,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2147.3ms TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:19:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-06-05 06:19:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 6394. [2021-06-05 06:19:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 3.4135773502268107) internal successors, (21823), 6393 states have internal predecessors, (21823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 21823 transitions. [2021-06-05 06:19:47,089 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 21823 transitions. Word has length 30 [2021-06-05 06:19:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:47,090 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 21823 transitions. [2021-06-05 06:19:47,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 21823 transitions. [2021-06-05 06:19:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:47,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:47,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:47,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:47,299 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:47,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1737022281, now seen corresponding path program 26 times [2021-06-05 06:19:47,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:47,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461058267] [2021-06-05 06:19:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:47,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:47,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461058267] [2021-06-05 06:19:47,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461058267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:47,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517771374] [2021-06-05 06:19:47,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:47,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:19:47,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:47,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:19:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:48,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:48,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:48,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:19:48,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:19:48,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:48,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:48,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:48,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:19:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:48,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517771374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:48,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:48,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 06:19:48,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670965088] [2021-06-05 06:19:48,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:19:48,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:48,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:19:48,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:19:48,074 INFO L87 Difference]: Start difference. First operand 6394 states and 21823 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:53,220 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-06-05 06:19:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:53,750 INFO L93 Difference]: Finished difference Result 8768 states and 28896 transitions. [2021-06-05 06:19:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 06:19:53,751 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:53,765 INFO L225 Difference]: With dead ends: 8768 [2021-06-05 06:19:53,765 INFO L226 Difference]: Without dead ends: 8735 [2021-06-05 06:19:53,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3330 ImplicationChecksByTransitivity, 4591.7ms TimeCoverageRelationStatistics Valid=1406, Invalid=8694, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 06:19:53,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-06-05 06:19:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 6450. [2021-06-05 06:19:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.4129322375562103) internal successors, (22010), 6449 states have internal predecessors, (22010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 22010 transitions. [2021-06-05 06:19:53,874 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 22010 transitions. Word has length 30 [2021-06-05 06:19:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:53,874 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 22010 transitions. [2021-06-05 06:19:53,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 22010 transitions. [2021-06-05 06:19:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:53,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:53,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:54,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:54,083 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1248501593, now seen corresponding path program 27 times [2021-06-05 06:19:54,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:54,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131341158] [2021-06-05 06:19:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:54,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:54,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131341158] [2021-06-05 06:19:54,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131341158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:54,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534450048] [2021-06-05 06:19:54,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:54,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:19:54,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:19:54,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:54,750 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 06:19:54,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 78 [2021-06-05 06:19:54,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:19:54,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:54,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:54,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:18 [2021-06-05 06:19:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:54,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534450048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:54,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:54,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 06:19:54,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480326791] [2021-06-05 06:19:54,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:19:54,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:54,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:19:54,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:19:54,871 INFO L87 Difference]: Start difference. First operand 6450 states and 22010 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:56,157 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 06:19:57,271 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-05 06:19:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:19:58,026 INFO L93 Difference]: Finished difference Result 10387 states and 34070 transitions. [2021-06-05 06:19:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:19:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:19:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:19:58,044 INFO L225 Difference]: With dead ends: 10387 [2021-06-05 06:19:58,044 INFO L226 Difference]: Without dead ends: 10372 [2021-06-05 06:19:58,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2571.6ms TimeCoverageRelationStatistics Valid=647, Invalid=4465, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:19:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10372 states. [2021-06-05 06:19:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10372 to 6469. [2021-06-05 06:19:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6469 states, 6468 states have (on average 3.41017316017316) internal successors, (22057), 6468 states have internal predecessors, (22057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 22057 transitions. [2021-06-05 06:19:58,189 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 22057 transitions. Word has length 30 [2021-06-05 06:19:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:19:58,189 INFO L482 AbstractCegarLoop]: Abstraction has 6469 states and 22057 transitions. [2021-06-05 06:19:58,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:19:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 22057 transitions. [2021-06-05 06:19:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:19:58,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:19:58,198 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:19:58,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:58,398 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:19:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:19:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1869142242, now seen corresponding path program 60 times [2021-06-05 06:19:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:19:58,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950071638] [2021-06-05 06:19:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:19:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:19:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:58,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:19:58,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950071638] [2021-06-05 06:19:58,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950071638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:58,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850129012] [2021-06-05 06:19:58,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:19:58,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:19:58,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:19:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:19:58,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:19:58,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:19:58,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:58,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:19:58,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:19:58,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:19:58,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:19:58,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:142 [2021-06-05 06:19:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:19:59,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850129012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:19:59,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:19:59,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 06:19:59,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290335384] [2021-06-05 06:19:59,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:19:59,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:19:59,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:19:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:19:59,160 INFO L87 Difference]: Start difference. First operand 6469 states and 22057 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:01,353 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 06:20:01,585 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 06:20:01,824 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-05 06:20:01,993 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 06:20:02,564 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 06:20:03,819 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-05 06:20:03,958 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-05 06:20:04,368 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 06:20:06,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:06,060 INFO L93 Difference]: Finished difference Result 9384 states and 30854 transitions. [2021-06-05 06:20:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 06:20:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:06,075 INFO L225 Difference]: With dead ends: 9384 [2021-06-05 06:20:06,075 INFO L226 Difference]: Without dead ends: 9343 [2021-06-05 06:20:06,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 6121.3ms TimeCoverageRelationStatistics Valid=1325, Invalid=9181, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 06:20:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9343 states. [2021-06-05 06:20:06,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9343 to 6512. [2021-06-05 06:20:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 3.412225464598372) internal successors, (22217), 6511 states have internal predecessors, (22217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 22217 transitions. [2021-06-05 06:20:06,200 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 22217 transitions. Word has length 30 [2021-06-05 06:20:06,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:06,201 INFO L482 AbstractCegarLoop]: Abstraction has 6512 states and 22217 transitions. [2021-06-05 06:20:06,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 22217 transitions. [2021-06-05 06:20:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:06,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:06,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:06,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:06,411 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:06,411 INFO L82 PathProgramCache]: Analyzing trace with hash -257494774, now seen corresponding path program 61 times [2021-06-05 06:20:06,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:06,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662656468] [2021-06-05 06:20:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:06,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662656468] [2021-06-05 06:20:06,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662656468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:06,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110544659] [2021-06-05 06:20:06,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:20:06,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:06,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:06,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:20:06,924 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:20:06,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:06,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:06,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:20:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:06,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110544659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:06,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:06,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:20:06,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728849468] [2021-06-05 06:20:06,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:20:06,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:06,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:20:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:20:06,977 INFO L87 Difference]: Start difference. First operand 6512 states and 22217 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:11,349 INFO L93 Difference]: Finished difference Result 9850 states and 32506 transitions. [2021-06-05 06:20:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 06:20:11,349 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:11,365 INFO L225 Difference]: With dead ends: 9850 [2021-06-05 06:20:11,365 INFO L226 Difference]: Without dead ends: 9812 [2021-06-05 06:20:11,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3520.9ms TimeCoverageRelationStatistics Valid=970, Invalid=5836, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 06:20:11,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9812 states. [2021-06-05 06:20:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9812 to 6527. [2021-06-05 06:20:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 3.4121973643885997) internal successors, (22268), 6526 states have internal predecessors, (22268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 22268 transitions. [2021-06-05 06:20:11,525 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 22268 transitions. Word has length 30 [2021-06-05 06:20:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:11,525 INFO L482 AbstractCegarLoop]: Abstraction has 6527 states and 22268 transitions. [2021-06-05 06:20:11,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 22268 transitions. [2021-06-05 06:20:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:11,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:11,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:11,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 06:20:11,734 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:11,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1531873319, now seen corresponding path program 28 times [2021-06-05 06:20:11,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:11,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259689951] [2021-06-05 06:20:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:12,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:12,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259689951] [2021-06-05 06:20:12,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259689951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:12,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522359243] [2021-06-05 06:20:12,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:12,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:20:12,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:12,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:20:12,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:12,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:20:12,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:12,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:12,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:12,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:20:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:12,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522359243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:12,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:12,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 06:20:12,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428855945] [2021-06-05 06:20:12,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:20:12,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:12,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:20:12,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:20:12,256 INFO L87 Difference]: Start difference. First operand 6527 states and 22268 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:15,283 INFO L93 Difference]: Finished difference Result 10842 states and 35758 transitions. [2021-06-05 06:20:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:20:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:15,300 INFO L225 Difference]: With dead ends: 10842 [2021-06-05 06:20:15,301 INFO L226 Difference]: Without dead ends: 10821 [2021-06-05 06:20:15,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2392.5ms TimeCoverageRelationStatistics Valid=747, Invalid=4509, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:20:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10821 states. [2021-06-05 06:20:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10821 to 6634. [2021-06-05 06:20:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6634 states, 6633 states have (on average 3.4168551183476557) internal successors, (22664), 6633 states have internal predecessors, (22664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 22664 transitions. [2021-06-05 06:20:15,426 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 22664 transitions. Word has length 30 [2021-06-05 06:20:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:15,426 INFO L482 AbstractCegarLoop]: Abstraction has 6634 states and 22664 transitions. [2021-06-05 06:20:15,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 22664 transitions. [2021-06-05 06:20:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:15,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:15,435 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:15,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:15,637 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash 241234517, now seen corresponding path program 29 times [2021-06-05 06:20:15,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:15,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916033703] [2021-06-05 06:20:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:15,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:15,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916033703] [2021-06-05 06:20:15,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916033703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:15,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870022118] [2021-06-05 06:20:15,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:15,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:20:15,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:15,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:20:15,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:16,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:16,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:16,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 06:20:16,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:16,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:16,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:16,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 06:20:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:16,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870022118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:16,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:16,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 06:20:16,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631268839] [2021-06-05 06:20:16,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:20:16,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:16,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:20:16,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:20:16,185 INFO L87 Difference]: Start difference. First operand 6634 states and 22664 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:17,321 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 06:20:19,086 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 06:20:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:20,427 INFO L93 Difference]: Finished difference Result 11958 states and 39090 transitions. [2021-06-05 06:20:20,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:20:20,427 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:20,446 INFO L225 Difference]: With dead ends: 11958 [2021-06-05 06:20:20,446 INFO L226 Difference]: Without dead ends: 11901 [2021-06-05 06:20:20,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 3530.6ms TimeCoverageRelationStatistics Valid=1317, Invalid=7239, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 06:20:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11901 states. [2021-06-05 06:20:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11901 to 6665. [2021-06-05 06:20:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.4191176470588234) internal successors, (22785), 6664 states have internal predecessors, (22785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 22785 transitions. [2021-06-05 06:20:20,587 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 22785 transitions. Word has length 30 [2021-06-05 06:20:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:20,587 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 22785 transitions. [2021-06-05 06:20:20,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 22785 transitions. [2021-06-05 06:20:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:20,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:20,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:20,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-05 06:20:20,796 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash -49932476, now seen corresponding path program 62 times [2021-06-05 06:20:20,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:20,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031687162] [2021-06-05 06:20:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:21,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:21,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031687162] [2021-06-05 06:20:21,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031687162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:21,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110493596] [2021-06-05 06:20:21,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:21,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:21,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:20:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:21,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:21,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:20:21,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:21,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:21,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:21,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:127 [2021-06-05 06:20:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:21,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110493596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:21,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:21,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 06:20:21,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108914918] [2021-06-05 06:20:21,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:20:21,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:21,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:20:21,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:20:21,512 INFO L87 Difference]: Start difference. First operand 6665 states and 22785 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:23,761 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-05 06:20:24,180 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 06:20:25,359 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 06:20:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:26,973 INFO L93 Difference]: Finished difference Result 9555 states and 31508 transitions. [2021-06-05 06:20:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 06:20:26,974 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:26,989 INFO L225 Difference]: With dead ends: 9555 [2021-06-05 06:20:26,989 INFO L226 Difference]: Without dead ends: 9497 [2021-06-05 06:20:26,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 4343.5ms TimeCoverageRelationStatistics Valid=997, Invalid=7745, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 06:20:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-05 06:20:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 6661. [2021-06-05 06:20:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 3.4181681681681684) internal successors, (22765), 6660 states have internal predecessors, (22765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 22765 transitions. [2021-06-05 06:20:27,118 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 22765 transitions. Word has length 30 [2021-06-05 06:20:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:27,118 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 22765 transitions. [2021-06-05 06:20:27,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 22765 transitions. [2021-06-05 06:20:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:27,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:27,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:27,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 06:20:27,327 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:27,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1734813122, now seen corresponding path program 63 times [2021-06-05 06:20:27,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:27,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193692956] [2021-06-05 06:20:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:27,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:27,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193692956] [2021-06-05 06:20:27,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193692956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:27,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492591163] [2021-06-05 06:20:27,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:27,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:20:27,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:27,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:20:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:27,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:27,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:27,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:20:27,808 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:20:27,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:27,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:27,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:20:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:27,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492591163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:27,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:27,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:20:27,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560871871] [2021-06-05 06:20:27,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:20:27,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:20:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:20:27,877 INFO L87 Difference]: Start difference. First operand 6661 states and 22765 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:31,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:31,217 INFO L93 Difference]: Finished difference Result 9025 states and 30264 transitions. [2021-06-05 06:20:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:20:31,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:31,230 INFO L225 Difference]: With dead ends: 9025 [2021-06-05 06:20:31,231 INFO L226 Difference]: Without dead ends: 9000 [2021-06-05 06:20:31,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2675.9ms TimeCoverageRelationStatistics Valid=655, Invalid=4457, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:20:31,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2021-06-05 06:20:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 6636. [2021-06-05 06:20:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 3.417633760361718) internal successors, (22676), 6635 states have internal predecessors, (22676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 22676 transitions. [2021-06-05 06:20:31,336 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 22676 transitions. Word has length 30 [2021-06-05 06:20:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:31,336 INFO L482 AbstractCegarLoop]: Abstraction has 6636 states and 22676 transitions. [2021-06-05 06:20:31,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 22676 transitions. [2021-06-05 06:20:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:31,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:31,344 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:31,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:31,545 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:31,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1517125215, now seen corresponding path program 30 times [2021-06-05 06:20:31,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:31,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167626201] [2021-06-05 06:20:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:31,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:31,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167626201] [2021-06-05 06:20:31,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167626201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:31,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123943688] [2021-06-05 06:20:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:32,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:20:32,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:20:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:32,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:32,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:32,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:32,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 06:20:32,172 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:20:32,192 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-06-05 06:20:32,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:32,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 06:20:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:32,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123943688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:32,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:32,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:20:32,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296568720] [2021-06-05 06:20:32,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:20:32,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:32,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:20:32,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:20:32,261 INFO L87 Difference]: Start difference. First operand 6636 states and 22676 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:36,435 INFO L93 Difference]: Finished difference Result 9140 states and 30189 transitions. [2021-06-05 06:20:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:20:36,435 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:36,450 INFO L225 Difference]: With dead ends: 9140 [2021-06-05 06:20:36,450 INFO L226 Difference]: Without dead ends: 9091 [2021-06-05 06:20:36,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 3331.3ms TimeCoverageRelationStatistics Valid=953, Invalid=6529, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 06:20:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2021-06-05 06:20:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 6597. [2021-06-05 06:20:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6597 states, 6596 states have (on average 3.4181322013341418) internal successors, (22546), 6596 states have internal predecessors, (22546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6597 states to 6597 states and 22546 transitions. [2021-06-05 06:20:36,564 INFO L78 Accepts]: Start accepts. Automaton has 6597 states and 22546 transitions. Word has length 30 [2021-06-05 06:20:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:36,564 INFO L482 AbstractCegarLoop]: Abstraction has 6597 states and 22546 transitions. [2021-06-05 06:20:36,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6597 states and 22546 transitions. [2021-06-05 06:20:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:36,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:36,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:36,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:36,773 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:36,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1193558822, now seen corresponding path program 64 times [2021-06-05 06:20:36,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:36,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881888027] [2021-06-05 06:20:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:37,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881888027] [2021-06-05 06:20:37,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881888027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182525632] [2021-06-05 06:20:37,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:37,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:20:37,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:37,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:20:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:37,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:37,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:37,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:20:37,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:37,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:37,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:37,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:20:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:37,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182525632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:37,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:37,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:20:37,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426191233] [2021-06-05 06:20:37,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:20:37,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:37,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:20:37,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:20:37,351 INFO L87 Difference]: Start difference. First operand 6597 states and 22546 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:40,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:40,198 INFO L93 Difference]: Finished difference Result 8362 states and 28087 transitions. [2021-06-05 06:20:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:20:40,199 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:40,217 INFO L225 Difference]: With dead ends: 8362 [2021-06-05 06:20:40,217 INFO L226 Difference]: Without dead ends: 8347 [2021-06-05 06:20:40,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2423.7ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:20:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8347 states. [2021-06-05 06:20:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8347 to 6603. [2021-06-05 06:20:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6603 states, 6602 states have (on average 3.4180551348076342) internal successors, (22566), 6602 states have internal predecessors, (22566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 22566 transitions. [2021-06-05 06:20:40,343 INFO L78 Accepts]: Start accepts. Automaton has 6603 states and 22566 transitions. Word has length 30 [2021-06-05 06:20:40,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:40,344 INFO L482 AbstractCegarLoop]: Abstraction has 6603 states and 22566 transitions. [2021-06-05 06:20:40,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:40,344 INFO L276 IsEmpty]: Start isEmpty. Operand 6603 states and 22566 transitions. [2021-06-05 06:20:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:40,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:40,353 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:40,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 06:20:40,599 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash 611989314, now seen corresponding path program 65 times [2021-06-05 06:20:40,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:40,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820669208] [2021-06-05 06:20:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:40,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:40,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820669208] [2021-06-05 06:20:40,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820669208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:40,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812814079] [2021-06-05 06:20:40,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:40,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:20:40,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:40,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:20:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:41,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:41,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:41,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:20:41,024 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:20:41,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:41,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:41,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:20:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:41,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812814079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:41,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:41,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:20:41,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531827843] [2021-06-05 06:20:41,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:20:41,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:41,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:20:41,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:20:41,093 INFO L87 Difference]: Start difference. First operand 6603 states and 22566 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:45,058 INFO L93 Difference]: Finished difference Result 9359 states and 31301 transitions. [2021-06-05 06:20:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:20:45,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:45,073 INFO L225 Difference]: With dead ends: 9359 [2021-06-05 06:20:45,073 INFO L226 Difference]: Without dead ends: 9312 [2021-06-05 06:20:45,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 3119.5ms TimeCoverageRelationStatistics Valid=790, Invalid=5372, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:20:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9312 states. [2021-06-05 06:20:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9312 to 6619. [2021-06-05 06:20:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6618 states have (on average 3.4177999395587793) internal successors, (22619), 6618 states have internal predecessors, (22619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 22619 transitions. [2021-06-05 06:20:45,191 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 22619 transitions. Word has length 30 [2021-06-05 06:20:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:45,191 INFO L482 AbstractCegarLoop]: Abstraction has 6619 states and 22619 transitions. [2021-06-05 06:20:45,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 22619 transitions. [2021-06-05 06:20:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:45,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:45,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:45,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 06:20:45,400 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:45,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1029376390, now seen corresponding path program 66 times [2021-06-05 06:20:45,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:45,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348545636] [2021-06-05 06:20:45,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:45,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:45,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348545636] [2021-06-05 06:20:45,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348545636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:45,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156167223] [2021-06-05 06:20:45,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:45,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:20:45,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:45,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:20:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:45,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:45,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:20:45,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:45,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:45,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:45,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:125 [2021-06-05 06:20:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:46,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156167223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:46,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:46,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 06:20:46,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693999123] [2021-06-05 06:20:46,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:20:46,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:46,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:20:46,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:20:46,063 INFO L87 Difference]: Start difference. First operand 6619 states and 22619 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:48,306 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 06:20:48,655 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 06:20:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:51,066 INFO L93 Difference]: Finished difference Result 9450 states and 31390 transitions. [2021-06-05 06:20:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 06:20:51,066 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:51,082 INFO L225 Difference]: With dead ends: 9450 [2021-06-05 06:20:51,083 INFO L226 Difference]: Without dead ends: 9389 [2021-06-05 06:20:51,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 4143.3ms TimeCoverageRelationStatistics Valid=875, Invalid=6607, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 06:20:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2021-06-05 06:20:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 6626. [2021-06-05 06:20:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 3.4176603773584904) internal successors, (22642), 6625 states have internal predecessors, (22642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 22642 transitions. [2021-06-05 06:20:51,211 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 22642 transitions. Word has length 30 [2021-06-05 06:20:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:51,211 INFO L482 AbstractCegarLoop]: Abstraction has 6626 states and 22642 transitions. [2021-06-05 06:20:51,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 22642 transitions. [2021-06-05 06:20:51,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:51,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:51,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:51,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:51,421 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1086081622, now seen corresponding path program 67 times [2021-06-05 06:20:51,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:51,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062016951] [2021-06-05 06:20:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:51,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:51,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062016951] [2021-06-05 06:20:51,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062016951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:51,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248200155] [2021-06-05 06:20:51,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:20:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:51,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:51,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:51,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:51,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 06:20:51,856 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:20:51,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:51,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:51,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 06:20:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:51,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248200155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:51,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:51,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:20:51,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850247873] [2021-06-05 06:20:51,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:20:51,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:51,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:20:51,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:20:51,932 INFO L87 Difference]: Start difference. First operand 6626 states and 22642 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:53,681 INFO L93 Difference]: Finished difference Result 8651 states and 29045 transitions. [2021-06-05 06:20:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:20:53,681 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:53,695 INFO L225 Difference]: With dead ends: 8651 [2021-06-05 06:20:53,696 INFO L226 Difference]: Without dead ends: 8626 [2021-06-05 06:20:53,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1226.2ms TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:20:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-06-05 06:20:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 6640. [2021-06-05 06:20:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6640 states, 6639 states have (on average 3.4181352613345384) internal successors, (22693), 6639 states have internal predecessors, (22693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6640 states to 6640 states and 22693 transitions. [2021-06-05 06:20:53,831 INFO L78 Accepts]: Start accepts. Automaton has 6640 states and 22693 transitions. Word has length 30 [2021-06-05 06:20:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:53,832 INFO L482 AbstractCegarLoop]: Abstraction has 6640 states and 22693 transitions. [2021-06-05 06:20:53,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 6640 states and 22693 transitions. [2021-06-05 06:20:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:53,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:53,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:54,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:54,041 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:54,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1576250863, now seen corresponding path program 31 times [2021-06-05 06:20:54,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:54,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282931360] [2021-06-05 06:20:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:54,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:54,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282931360] [2021-06-05 06:20:54,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282931360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:54,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22105674] [2021-06-05 06:20:54,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:54,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:20:54,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:54,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:54,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:54,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:54,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:54,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:20:54,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:54,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:54,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:54,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:20:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:54,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22105674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:54,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:54,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:20:54,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292959887] [2021-06-05 06:20:54,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:20:54,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:54,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:20:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:20:54,678 INFO L87 Difference]: Start difference. First operand 6640 states and 22693 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:58,034 INFO L93 Difference]: Finished difference Result 8380 states and 27963 transitions. [2021-06-05 06:20:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:20:58,034 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:20:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:58,047 INFO L225 Difference]: With dead ends: 8380 [2021-06-05 06:20:58,047 INFO L226 Difference]: Without dead ends: 8358 [2021-06-05 06:20:58,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 2990.4ms TimeCoverageRelationStatistics Valid=897, Invalid=5909, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 06:20:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-06-05 06:20:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6638. [2021-06-05 06:20:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 3.418411933102305) internal successors, (22688), 6637 states have internal predecessors, (22688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 22688 transitions. [2021-06-05 06:20:58,144 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 22688 transitions. Word has length 30 [2021-06-05 06:20:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:58,144 INFO L482 AbstractCegarLoop]: Abstraction has 6638 states and 22688 transitions. [2021-06-05 06:20:58,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 22688 transitions. [2021-06-05 06:20:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:20:58,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:58,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:58,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 06:20:58,353 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:58,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1302931307, now seen corresponding path program 32 times [2021-06-05 06:20:58,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:58,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006022751] [2021-06-05 06:20:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:58,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:58,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006022751] [2021-06-05 06:20:58,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006022751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:58,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836854932] [2021-06-05 06:20:58,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:58,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:58,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:58,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:20:58,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:58,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:58,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:58,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-06-05 06:20:58,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:58,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:58,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:20:58,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:20 [2021-06-05 06:20:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:59,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836854932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:59,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:59,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:20:59,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284335586] [2021-06-05 06:20:59,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:20:59,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:59,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:20:59,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:20:59,063 INFO L87 Difference]: Start difference. First operand 6638 states and 22688 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:01,363 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 06:21:02,050 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 06:21:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:05,421 INFO L93 Difference]: Finished difference Result 10721 states and 35147 transitions. [2021-06-05 06:21:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 06:21:05,421 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:05,441 INFO L225 Difference]: With dead ends: 10721 [2021-06-05 06:21:05,441 INFO L226 Difference]: Without dead ends: 10673 [2021-06-05 06:21:05,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 5264.3ms TimeCoverageRelationStatistics Valid=1470, Invalid=10740, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 06:21:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2021-06-05 06:21:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6649. [2021-06-05 06:21:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6649 states, 6648 states have (on average 3.417870036101083) internal successors, (22722), 6648 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 22722 transitions. [2021-06-05 06:21:05,582 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 22722 transitions. Word has length 30 [2021-06-05 06:21:05,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:05,583 INFO L482 AbstractCegarLoop]: Abstraction has 6649 states and 22722 transitions. [2021-06-05 06:21:05,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 22722 transitions. [2021-06-05 06:21:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:05,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:05,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:05,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:05,791 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash 276275861, now seen corresponding path program 33 times [2021-06-05 06:21:05,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:05,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868072684] [2021-06-05 06:21:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:06,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:06,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868072684] [2021-06-05 06:21:06,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868072684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:06,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983466459] [2021-06-05 06:21:06,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:06,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:21:06,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:21:06,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:06,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:06,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 47 [2021-06-05 06:21:06,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:21:06,426 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-06-05 06:21:06,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:06,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-05 06:21:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:06,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983466459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:06,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:06,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 06:21:06,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095893331] [2021-06-05 06:21:06,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:21:06,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:06,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:21:06,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:21:06,548 INFO L87 Difference]: Start difference. First operand 6649 states and 22722 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:08,328 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 06:21:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:10,035 INFO L93 Difference]: Finished difference Result 10431 states and 34548 transitions. [2021-06-05 06:21:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:21:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:10,051 INFO L225 Difference]: With dead ends: 10431 [2021-06-05 06:21:10,051 INFO L226 Difference]: Without dead ends: 10368 [2021-06-05 06:21:10,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2895.9ms TimeCoverageRelationStatistics Valid=877, Invalid=5129, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:21:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10368 states. [2021-06-05 06:21:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10368 to 6656. [2021-06-05 06:21:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 3.417129977460556) internal successors, (22741), 6655 states have internal predecessors, (22741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 22741 transitions. [2021-06-05 06:21:10,191 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 22741 transitions. Word has length 30 [2021-06-05 06:21:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:10,191 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 22741 transitions. [2021-06-05 06:21:10,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 22741 transitions. [2021-06-05 06:21:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:10,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:10,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:10,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:10,400 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1350859047, now seen corresponding path program 34 times [2021-06-05 06:21:10,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:10,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257447828] [2021-06-05 06:21:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:10,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:10,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257447828] [2021-06-05 06:21:10,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257447828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:10,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598714195] [2021-06-05 06:21:10,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:10,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:10,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:10,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:21:10,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:10,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:10,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:10,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:10,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:10,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 06:21:10,938 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:21:10,956 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-06-05 06:21:10,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:10,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-06-05 06:21:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:11,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598714195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:11,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:11,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 06:21:11,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299970731] [2021-06-05 06:21:11,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:21:11,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:21:11,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:21:11,034 INFO L87 Difference]: Start difference. First operand 6656 states and 22741 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:13,084 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 06:21:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:13,914 INFO L93 Difference]: Finished difference Result 10017 states and 33312 transitions. [2021-06-05 06:21:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:21:13,915 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:13,930 INFO L225 Difference]: With dead ends: 10017 [2021-06-05 06:21:13,930 INFO L226 Difference]: Without dead ends: 9945 [2021-06-05 06:21:13,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2411.2ms TimeCoverageRelationStatistics Valid=723, Invalid=4107, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:21:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2021-06-05 06:21:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 6722. [2021-06-05 06:21:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.41809254575212) internal successors, (22973), 6721 states have internal predecessors, (22973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22973 transitions. [2021-06-05 06:21:14,053 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22973 transitions. Word has length 30 [2021-06-05 06:21:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:14,053 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22973 transitions. [2021-06-05 06:21:14,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22973 transitions. [2021-06-05 06:21:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:14,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:14,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:14,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 06:21:14,262 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655007, now seen corresponding path program 35 times [2021-06-05 06:21:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:14,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593684026] [2021-06-05 06:21:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:14,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:14,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593684026] [2021-06-05 06:21:14,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593684026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:14,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675352292] [2021-06-05 06:21:14,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:14,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:21:14,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:21:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:14,975 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:21:14,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-06-05 06:21:14,977 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:14,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:14,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:14,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-06-05 06:21:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:14,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675352292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:14,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:14,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:21:14,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176759940] [2021-06-05 06:21:14,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:21:14,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:14,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:21:14,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:21:15,000 INFO L87 Difference]: Start difference. First operand 6722 states and 22973 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:19,911 INFO L93 Difference]: Finished difference Result 8927 states and 29552 transitions. [2021-06-05 06:21:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 06:21:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:19,924 INFO L225 Difference]: With dead ends: 8927 [2021-06-05 06:21:19,924 INFO L226 Difference]: Without dead ends: 8898 [2021-06-05 06:21:19,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 4198.8ms TimeCoverageRelationStatistics Valid=1157, Invalid=8743, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 06:21:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2021-06-05 06:21:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 6748. [2021-06-05 06:21:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 6747 states have (on average 3.4179635393508225) internal successors, (23061), 6747 states have internal predecessors, (23061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 23061 transitions. [2021-06-05 06:21:20,027 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 23061 transitions. Word has length 30 [2021-06-05 06:21:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:20,027 INFO L482 AbstractCegarLoop]: Abstraction has 6748 states and 23061 transitions. [2021-06-05 06:21:20,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 23061 transitions. [2021-06-05 06:21:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:20,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:20,035 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:20,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 06:21:20,236 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1871803969, now seen corresponding path program 36 times [2021-06-05 06:21:20,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:20,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056004109] [2021-06-05 06:21:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:20,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:20,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056004109] [2021-06-05 06:21:20,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056004109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:20,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567317355] [2021-06-05 06:21:20,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:20,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:21:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:21:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:20,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:20,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 43 [2021-06-05 06:21:20,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:21:20,932 INFO L628 ElimStorePlain]: treesize reduction 100, result has 16.7 percent of original size [2021-06-05 06:21:20,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:20,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:20 [2021-06-05 06:21:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:21,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567317355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:21,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:21,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 06:21:21,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738117869] [2021-06-05 06:21:21,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:21:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:21,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:21:21,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:21:21,031 INFO L87 Difference]: Start difference. First operand 6748 states and 23061 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:27,381 INFO L93 Difference]: Finished difference Result 11440 states and 37396 transitions. [2021-06-05 06:21:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 06:21:27,381 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:27,400 INFO L225 Difference]: With dead ends: 11440 [2021-06-05 06:21:27,400 INFO L226 Difference]: Without dead ends: 11377 [2021-06-05 06:21:27,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4941 ImplicationChecksByTransitivity, 5548.1ms TimeCoverageRelationStatistics Valid=1803, Invalid=13203, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 06:21:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11377 states. [2021-06-05 06:21:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11377 to 6877. [2021-06-05 06:21:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6877 states, 6876 states have (on average 3.4157940663176265) internal successors, (23487), 6876 states have internal predecessors, (23487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 23487 transitions. [2021-06-05 06:21:27,533 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 23487 transitions. Word has length 30 [2021-06-05 06:21:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:27,533 INFO L482 AbstractCegarLoop]: Abstraction has 6877 states and 23487 transitions. [2021-06-05 06:21:27,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 23487 transitions. [2021-06-05 06:21:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:27,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:27,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:27,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 06:21:27,742 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1119954797, now seen corresponding path program 37 times [2021-06-05 06:21:27,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:27,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81852684] [2021-06-05 06:21:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:28,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:28,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81852684] [2021-06-05 06:21:28,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81852684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:28,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144293199] [2021-06-05 06:21:28,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:28,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:21:28,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:28,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:28,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:28,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:21:28,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:28,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:28,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:28,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-06-05 06:21:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:28,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144293199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:28,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:28,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 06:21:28,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768521325] [2021-06-05 06:21:28,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:28,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:28,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:28,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:28,503 INFO L87 Difference]: Start difference. First operand 6877 states and 23487 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:33,074 INFO L93 Difference]: Finished difference Result 8722 states and 29097 transitions. [2021-06-05 06:21:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:21:33,074 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:33,086 INFO L225 Difference]: With dead ends: 8722 [2021-06-05 06:21:33,086 INFO L226 Difference]: Without dead ends: 8696 [2021-06-05 06:21:33,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 4037.3ms TimeCoverageRelationStatistics Valid=874, Invalid=6608, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 06:21:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8696 states. [2021-06-05 06:21:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8696 to 6874. [2021-06-05 06:21:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-06-05 06:21:33,180 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-06-05 06:21:33,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:33,180 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-06-05 06:21:33,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-06-05 06:21:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:33,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:33,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:33,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:33,389 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:33,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:33,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1353770535, now seen corresponding path program 38 times [2021-06-05 06:21:33,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:33,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668297634] [2021-06-05 06:21:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:33,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:33,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668297634] [2021-06-05 06:21:33,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668297634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:33,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37739492] [2021-06-05 06:21:33,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:33,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:33,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:33,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:21:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:33,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:33,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:33,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:21:33,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:33,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:33,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:33,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:21:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:34,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37739492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:34,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:34,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:21:34,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067236590] [2021-06-05 06:21:34,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:21:34,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:34,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:21:34,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:21:34,001 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:36,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:36,118 INFO L93 Difference]: Finished difference Result 8472 states and 28350 transitions. [2021-06-05 06:21:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:21:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:36,130 INFO L225 Difference]: With dead ends: 8472 [2021-06-05 06:21:36,130 INFO L226 Difference]: Without dead ends: 8446 [2021-06-05 06:21:36,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1846.3ms TimeCoverageRelationStatistics Valid=445, Invalid=2861, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:21:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2021-06-05 06:21:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 6874. [2021-06-05 06:21:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-06-05 06:21:36,228 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-06-05 06:21:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:36,228 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-06-05 06:21:36,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-06-05 06:21:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:36,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:36,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:36,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 06:21:36,437 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash -153504787, now seen corresponding path program 39 times [2021-06-05 06:21:36,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:36,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414909819] [2021-06-05 06:21:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:36,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:36,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414909819] [2021-06-05 06:21:36,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414909819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:36,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638204913] [2021-06-05 06:21:36,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:36,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:21:36,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:36,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:21:36,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:36,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:36,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 06:21:36,996 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:21:37,010 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-06-05 06:21:37,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:37,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 06:21:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:37,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638204913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:37,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:37,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:21:37,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595856578] [2021-06-05 06:21:37,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:21:37,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:21:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:21:37,058 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:39,354 INFO L93 Difference]: Finished difference Result 9020 states and 29936 transitions. [2021-06-05 06:21:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:21:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:39,367 INFO L225 Difference]: With dead ends: 9020 [2021-06-05 06:21:39,367 INFO L226 Difference]: Without dead ends: 8964 [2021-06-05 06:21:39,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1790.4ms TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:21:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2021-06-05 06:21:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 6858. [2021-06-05 06:21:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6857 states have (on average 3.41519614991979) internal successors, (23418), 6857 states have internal predecessors, (23418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 23418 transitions. [2021-06-05 06:21:39,472 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 23418 transitions. Word has length 30 [2021-06-05 06:21:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:39,473 INFO L482 AbstractCegarLoop]: Abstraction has 6858 states and 23418 transitions. [2021-06-05 06:21:39,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 23418 transitions. [2021-06-05 06:21:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:39,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:39,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:39,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 06:21:39,685 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:39,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1190293913, now seen corresponding path program 40 times [2021-06-05 06:21:39,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:39,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700772466] [2021-06-05 06:21:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:40,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:40,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700772466] [2021-06-05 06:21:40,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700772466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:40,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285408714] [2021-06-05 06:21:40,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:40,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:40,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:21:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:40,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:40,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:40,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:40,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:40,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:21:40,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:40,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:40,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:40,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-06-05 06:21:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:40,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285408714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:40,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:40,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 06:21:40,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154012622] [2021-06-05 06:21:40,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:21:40,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:40,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:21:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:40,297 INFO L87 Difference]: Start difference. First operand 6858 states and 23418 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:41,777 INFO L93 Difference]: Finished difference Result 8455 states and 28275 transitions. [2021-06-05 06:21:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:21:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:41,789 INFO L225 Difference]: With dead ends: 8455 [2021-06-05 06:21:41,789 INFO L226 Difference]: Without dead ends: 8440 [2021-06-05 06:21:41,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1362.0ms TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:21:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2021-06-05 06:21:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 6848. [2021-06-05 06:21:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6848 states, 6847 states have (on average 3.416532788082372) internal successors, (23393), 6847 states have internal predecessors, (23393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6848 states to 6848 states and 23393 transitions. [2021-06-05 06:21:41,941 INFO L78 Accepts]: Start accepts. Automaton has 6848 states and 23393 transitions. Word has length 30 [2021-06-05 06:21:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:41,941 INFO L482 AbstractCegarLoop]: Abstraction has 6848 states and 23393 transitions. [2021-06-05 06:21:41,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 6848 states and 23393 transitions. [2021-06-05 06:21:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:41,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:41,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:42,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:42,150 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1093552081, now seen corresponding path program 41 times [2021-06-05 06:21:42,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:42,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043580720] [2021-06-05 06:21:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:42,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:42,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043580720] [2021-06-05 06:21:42,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043580720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:42,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33248874] [2021-06-05 06:21:42,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:42,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:21:42,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:42,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:21:42,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:42,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:42,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:42,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:42,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 06:21:42,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:21:42,706 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-06-05 06:21:42,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:42,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 06:21:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:42,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33248874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:42,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:42,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:21:42,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909941235] [2021-06-05 06:21:42,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:21:42,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:42,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:21:42,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:21:42,784 INFO L87 Difference]: Start difference. First operand 6848 states and 23393 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:44,582 INFO L93 Difference]: Finished difference Result 8682 states and 29011 transitions. [2021-06-05 06:21:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:21:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:44,595 INFO L225 Difference]: With dead ends: 8682 [2021-06-05 06:21:44,596 INFO L226 Difference]: Without dead ends: 8637 [2021-06-05 06:21:44,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1517.2ms TimeCoverageRelationStatistics Valid=350, Invalid=2620, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:21:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-06-05 06:21:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6836. [2021-06-05 06:21:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-06-05 06:21:44,706 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-06-05 06:21:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:44,706 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-06-05 06:21:44,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-06-05 06:21:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:44,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:44,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:44,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:44,915 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:44,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:44,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1107184069, now seen corresponding path program 42 times [2021-06-05 06:21:44,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:44,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106768806] [2021-06-05 06:21:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:45,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:45,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106768806] [2021-06-05 06:21:45,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106768806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:45,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455828521] [2021-06-05 06:21:45,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:45,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:21:45,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:21:45,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:45,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:45,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:45,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:45,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:45,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:21:45,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:45,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:45,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:45,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:21:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:45,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455828521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:45,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:45,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 06:21:45,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860766066] [2021-06-05 06:21:45,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:21:45,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:45,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:21:45,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:21:45,562 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:46,589 INFO L93 Difference]: Finished difference Result 8350 states and 28001 transitions. [2021-06-05 06:21:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:21:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:46,603 INFO L225 Difference]: With dead ends: 8350 [2021-06-05 06:21:46,603 INFO L226 Difference]: Without dead ends: 8335 [2021-06-05 06:21:46,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1163.7ms TimeCoverageRelationStatistics Valid=412, Invalid=2450, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:21:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-06-05 06:21:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 6836. [2021-06-05 06:21:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-06-05 06:21:46,705 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-06-05 06:21:46,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:46,705 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-06-05 06:21:46,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-06-05 06:21:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:46,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:46,715 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:46,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 06:21:46,915 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:46,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:46,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1610082335, now seen corresponding path program 43 times [2021-06-05 06:21:46,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:46,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316111644] [2021-06-05 06:21:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:47,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:47,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316111644] [2021-06-05 06:21:47,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316111644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:47,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364431775] [2021-06-05 06:21:47,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:21:47,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:47,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:47,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:47,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:47,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:47,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:21:47,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:47,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:47,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:47,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:21:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:47,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364431775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:47,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:47,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:21:47,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228249469] [2021-06-05 06:21:47,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:21:47,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:47,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:21:47,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:21:47,544 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:52,528 INFO L93 Difference]: Finished difference Result 10075 states and 32916 transitions. [2021-06-05 06:21:52,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 06:21:52,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:52,545 INFO L225 Difference]: With dead ends: 10075 [2021-06-05 06:21:52,545 INFO L226 Difference]: Without dead ends: 10049 [2021-06-05 06:21:52,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 4298.0ms TimeCoverageRelationStatistics Valid=1570, Invalid=8330, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 06:21:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10049 states. [2021-06-05 06:21:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10049 to 6864. [2021-06-05 06:21:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 6863 states have (on average 3.420370100539123) internal successors, (23474), 6863 states have internal predecessors, (23474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 23474 transitions. [2021-06-05 06:21:52,673 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 23474 transitions. Word has length 30 [2021-06-05 06:21:52,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:52,673 INFO L482 AbstractCegarLoop]: Abstraction has 6864 states and 23474 transitions. [2021-06-05 06:21:52,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 23474 transitions. [2021-06-05 06:21:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:52,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:52,682 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:52,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:52,883 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:52,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:52,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2098603023, now seen corresponding path program 44 times [2021-06-05 06:21:52,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:52,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252194757] [2021-06-05 06:21:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:53,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:53,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252194757] [2021-06-05 06:21:53,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252194757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:53,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619233252] [2021-06-05 06:21:53,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:53,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:53,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:53,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:21:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:53,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:53,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:53,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:21:53,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:53,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:53,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:53,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:3 [2021-06-05 06:21:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:53,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619233252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:53,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:53,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 06:21:53,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664895504] [2021-06-05 06:21:53,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:21:53,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:53,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:21:53,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:21:53,505 INFO L87 Difference]: Start difference. First operand 6864 states and 23474 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:55,831 INFO L93 Difference]: Finished difference Result 11521 states and 37730 transitions. [2021-06-05 06:21:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:21:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:21:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:55,849 INFO L225 Difference]: With dead ends: 11521 [2021-06-05 06:21:55,849 INFO L226 Difference]: Without dead ends: 11500 [2021-06-05 06:21:55,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1804.2ms TimeCoverageRelationStatistics Valid=665, Invalid=4447, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:21:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-06-05 06:21:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 6890. [2021-06-05 06:21:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6890 states, 6889 states have (on average 3.4235738133255915) internal successors, (23585), 6889 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6890 states to 6890 states and 23585 transitions. [2021-06-05 06:21:55,981 INFO L78 Accepts]: Start accepts. Automaton has 6890 states and 23585 transitions. Word has length 30 [2021-06-05 06:21:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:55,981 INFO L482 AbstractCegarLoop]: Abstraction has 6890 states and 23585 transitions. [2021-06-05 06:21:55,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6890 states and 23585 transitions. [2021-06-05 06:21:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:21:55,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:55,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:56,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:56,190 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:56,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2044173309, now seen corresponding path program 45 times [2021-06-05 06:21:56,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:56,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804129838] [2021-06-05 06:21:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:56,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:56,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804129838] [2021-06-05 06:21:56,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804129838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:56,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333014460] [2021-06-05 06:21:56,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:56,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:21:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:56,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:21:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:56,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:56,711 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 06:21:56,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 68 [2021-06-05 06:21:56,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:56,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:56,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:21:56,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:15 [2021-06-05 06:21:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:56,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333014460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:56,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:56,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 06:21:56,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529753567] [2021-06-05 06:21:56,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:21:56,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:56,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:21:56,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:21:56,767 INFO L87 Difference]: Start difference. First operand 6890 states and 23585 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:58,139 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 06:21:58,407 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 06:22:01,886 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 06:22:02,107 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 06:22:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:02,577 INFO L93 Difference]: Finished difference Result 11048 states and 36381 transitions. [2021-06-05 06:22:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 06:22:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:02,595 INFO L225 Difference]: With dead ends: 11048 [2021-06-05 06:22:02,595 INFO L226 Difference]: Without dead ends: 10971 [2021-06-05 06:22:02,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 4416.1ms TimeCoverageRelationStatistics Valid=1535, Invalid=9385, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 06:22:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-06-05 06:22:02,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 7036. [2021-06-05 06:22:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 3.4169154228855723) internal successors, (24038), 7035 states have internal predecessors, (24038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 24038 transitions. [2021-06-05 06:22:02,747 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 24038 transitions. Word has length 30 [2021-06-05 06:22:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:02,747 INFO L482 AbstractCegarLoop]: Abstraction has 7036 states and 24038 transitions. [2021-06-05 06:22:02,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 24038 transitions. [2021-06-05 06:22:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:02,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:02,757 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:02,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 06:22:02,958 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:02,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:02,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2029573961, now seen corresponding path program 46 times [2021-06-05 06:22:02,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:02,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595169534] [2021-06-05 06:22:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:03,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:03,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595169534] [2021-06-05 06:22:03,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595169534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:03,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746559031] [2021-06-05 06:22:03,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:03,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:03,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:22:03,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:03,662 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:22:03,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-06-05 06:22:03,664 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:03,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:03,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:03,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-06-05 06:22:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:03,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746559031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:03,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:03,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 06:22:03,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643181704] [2021-06-05 06:22:03,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:22:03,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:22:03,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:22:03,726 INFO L87 Difference]: Start difference. First operand 7036 states and 24038 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:04,515 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 06:22:06,814 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 06:22:07,026 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 06:22:07,558 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-05 06:22:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:08,893 INFO L93 Difference]: Finished difference Result 9538 states and 31634 transitions. [2021-06-05 06:22:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:22:08,894 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:08,908 INFO L225 Difference]: With dead ends: 9538 [2021-06-05 06:22:08,908 INFO L226 Difference]: Without dead ends: 9523 [2021-06-05 06:22:08,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 4506.2ms TimeCoverageRelationStatistics Valid=981, Invalid=6675, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:22:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-06-05 06:22:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 7037. [2021-06-05 06:22:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 7036 states have (on average 3.417140420693576) internal successors, (24043), 7036 states have internal predecessors, (24043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:09,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 24043 transitions. [2021-06-05 06:22:09,033 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 24043 transitions. Word has length 30 [2021-06-05 06:22:09,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:09,033 INFO L482 AbstractCegarLoop]: Abstraction has 7037 states and 24043 transitions. [2021-06-05 06:22:09,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 24043 transitions. [2021-06-05 06:22:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:09,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:09,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:09,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 06:22:09,244 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:09,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1541053273, now seen corresponding path program 47 times [2021-06-05 06:22:09,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:09,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590137918] [2021-06-05 06:22:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:09,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:09,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590137918] [2021-06-05 06:22:09,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590137918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:09,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714421801] [2021-06-05 06:22:09,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:09,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:22:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:09,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:22:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:09,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:09,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:09,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:09,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 06:22:09,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:09,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:09,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:09,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-05 06:22:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:09,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714421801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:09,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:09,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 06:22:09,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448920754] [2021-06-05 06:22:09,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:22:09,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:22:09,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:22:09,804 INFO L87 Difference]: Start difference. First operand 7037 states and 24043 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:15,495 INFO L93 Difference]: Finished difference Result 12819 states and 41403 transitions. [2021-06-05 06:22:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 06:22:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:15,515 INFO L225 Difference]: With dead ends: 12819 [2021-06-05 06:22:15,515 INFO L226 Difference]: Without dead ends: 12789 [2021-06-05 06:22:15,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4395 ImplicationChecksByTransitivity, 4608.3ms TimeCoverageRelationStatistics Valid=1803, Invalid=10853, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 06:22:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12789 states. [2021-06-05 06:22:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12789 to 7083. [2021-06-05 06:22:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.415419373058458) internal successors, (24188), 7082 states have internal predecessors, (24188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 24188 transitions. [2021-06-05 06:22:15,661 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 24188 transitions. Word has length 30 [2021-06-05 06:22:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:15,661 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 24188 transitions. [2021-06-05 06:22:15,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 24188 transitions. [2021-06-05 06:22:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:15,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:15,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:15,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 06:22:15,871 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:15,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1282297551, now seen corresponding path program 48 times [2021-06-05 06:22:15,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:15,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468671182] [2021-06-05 06:22:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:16,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:16,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468671182] [2021-06-05 06:22:16,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468671182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:16,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003287033] [2021-06-05 06:22:16,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:16,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:22:16,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:22:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:16,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:16,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:16,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:16,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 06:22:16,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:16,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:16,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:16,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-05 06:22:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:16,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003287033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:16,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:16,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 06:22:16,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591609856] [2021-06-05 06:22:16,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:22:16,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:16,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:22:16,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:22:16,633 INFO L87 Difference]: Start difference. First operand 7083 states and 24188 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:17,737 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 06:22:19,660 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 06:22:19,864 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 06:22:20,356 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-06-05 06:22:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:21,594 INFO L93 Difference]: Finished difference Result 9072 states and 30203 transitions. [2021-06-05 06:22:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:22:21,594 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:21,608 INFO L225 Difference]: With dead ends: 9072 [2021-06-05 06:22:21,608 INFO L226 Difference]: Without dead ends: 9057 [2021-06-05 06:22:21,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4297.8ms TimeCoverageRelationStatistics Valid=889, Invalid=6767, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:22:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-06-05 06:22:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7074. [2021-06-05 06:22:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 7073 states have (on average 3.4155238229888307) internal successors, (24158), 7073 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 24158 transitions. [2021-06-05 06:22:21,713 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 24158 transitions. Word has length 30 [2021-06-05 06:22:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:21,713 INFO L482 AbstractCegarLoop]: Abstraction has 7074 states and 24158 transitions. [2021-06-05 06:22:21,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 24158 transitions. [2021-06-05 06:22:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:21,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:21,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:21,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:21,923 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:21,923 INFO L82 PathProgramCache]: Analyzing trace with hash 499662597, now seen corresponding path program 49 times [2021-06-05 06:22:21,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:21,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939099086] [2021-06-05 06:22:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:22,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:22,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939099086] [2021-06-05 06:22:22,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939099086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:22,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498680965] [2021-06-05 06:22:22,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:22,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:22:22,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:22,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:22,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:22,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:22:22,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:22,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:22,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:22,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:22:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:22,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498680965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:22,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:22,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:22:22,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810398992] [2021-06-05 06:22:22,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:22:22,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:22,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:22:22,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:22:22,515 INFO L87 Difference]: Start difference. First operand 7074 states and 24158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:25,137 INFO L93 Difference]: Finished difference Result 8621 states and 28929 transitions. [2021-06-05 06:22:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:22:25,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:25,151 INFO L225 Difference]: With dead ends: 8621 [2021-06-05 06:22:25,151 INFO L226 Difference]: Without dead ends: 8595 [2021-06-05 06:22:25,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2126.9ms TimeCoverageRelationStatistics Valid=502, Invalid=3404, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:22:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2021-06-05 06:22:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 7060. [2021-06-05 06:22:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 3.417339566510837) internal successors, (24123), 7059 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 24123 transitions. [2021-06-05 06:22:25,259 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 24123 transitions. Word has length 30 [2021-06-05 06:22:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:25,259 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 24123 transitions. [2021-06-05 06:22:25,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 24123 transitions. [2021-06-05 06:22:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:25,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:25,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:25,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:25,470 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:25,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:25,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1728681022, now seen corresponding path program 68 times [2021-06-05 06:22:25,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:25,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093583301] [2021-06-05 06:22:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:25,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:25,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093583301] [2021-06-05 06:22:25,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093583301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:25,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072850668] [2021-06-05 06:22:25,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:25,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:25,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:25,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:22:25,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:25,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:25,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:25,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:22:25,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:25,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:25,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:25,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:22:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:25,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072850668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:25,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:25,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:22:25,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636183683] [2021-06-05 06:22:25,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:22:25,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:25,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:22:25,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:22:25,884 INFO L87 Difference]: Start difference. First operand 7060 states and 24123 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:26,711 INFO L93 Difference]: Finished difference Result 8380 states and 27726 transitions. [2021-06-05 06:22:26,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:22:26,712 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:26,725 INFO L225 Difference]: With dead ends: 8380 [2021-06-05 06:22:26,725 INFO L226 Difference]: Without dead ends: 8365 [2021-06-05 06:22:26,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 695.6ms TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:22:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-06-05 06:22:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 7072. [2021-06-05 06:22:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 7071 states have (on average 3.4171970018384954) internal successors, (24163), 7071 states have internal predecessors, (24163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 24163 transitions. [2021-06-05 06:22:26,915 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 24163 transitions. Word has length 30 [2021-06-05 06:22:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:26,915 INFO L482 AbstractCegarLoop]: Abstraction has 7072 states and 24163 transitions. [2021-06-05 06:22:26,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 24163 transitions. [2021-06-05 06:22:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:26,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:26,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:27,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 06:22:27,126 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:27,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:27,126 INFO L82 PathProgramCache]: Analyzing trace with hash -691888966, now seen corresponding path program 69 times [2021-06-05 06:22:27,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:27,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317320597] [2021-06-05 06:22:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:27,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:27,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317320597] [2021-06-05 06:22:27,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317320597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:27,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740394388] [2021-06-05 06:22:27,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:27,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:22:27,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:22:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:27,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:27,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:22:27,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:27,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:27,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:27,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 06:22:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:27,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740394388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:27,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:27,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:22:27,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880411582] [2021-06-05 06:22:27,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:22:27,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:22:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:22:27,642 INFO L87 Difference]: Start difference. First operand 7072 states and 24163 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:28,677 INFO L93 Difference]: Finished difference Result 8309 states and 27513 transitions. [2021-06-05 06:22:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:22:28,677 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:28,691 INFO L225 Difference]: With dead ends: 8309 [2021-06-05 06:22:28,691 INFO L226 Difference]: Without dead ends: 8279 [2021-06-05 06:22:28,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:22:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2021-06-05 06:22:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 7064. [2021-06-05 06:22:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 7063 states have (on average 3.4176695455189012) internal successors, (24139), 7063 states have internal predecessors, (24139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 24139 transitions. [2021-06-05 06:22:28,805 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 24139 transitions. Word has length 30 [2021-06-05 06:22:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:28,805 INFO L482 AbstractCegarLoop]: Abstraction has 7064 states and 24139 transitions. [2021-06-05 06:22:28,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 24139 transitions. [2021-06-05 06:22:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:28,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:28,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:29,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 06:22:29,015 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:29,016 INFO L82 PathProgramCache]: Analyzing trace with hash 682939496, now seen corresponding path program 70 times [2021-06-05 06:22:29,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:29,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050282596] [2021-06-05 06:22:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:29,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:29,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050282596] [2021-06-05 06:22:29,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050282596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:29,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923927994] [2021-06-05 06:22:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:29,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:29,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:29,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:22:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:29,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:29,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:29,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:22:29,384 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:29,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:29,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:29,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:22:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:29,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923927994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:29,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:29,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:22:29,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693512487] [2021-06-05 06:22:29,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:22:29,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:22:29,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:22:29,450 INFO L87 Difference]: Start difference. First operand 7064 states and 24139 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:31,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:31,866 INFO L93 Difference]: Finished difference Result 13253 states and 43828 transitions. [2021-06-05 06:22:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:22:31,867 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:31,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:31,887 INFO L225 Difference]: With dead ends: 13253 [2021-06-05 06:22:31,888 INFO L226 Difference]: Without dead ends: 13223 [2021-06-05 06:22:31,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1755.0ms TimeCoverageRelationStatistics Valid=663, Invalid=3759, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:22:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13223 states. [2021-06-05 06:22:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13223 to 7065. [2021-06-05 06:22:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 3.4173272933182335) internal successors, (24140), 7064 states have internal predecessors, (24140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 24140 transitions. [2021-06-05 06:22:32,028 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 24140 transitions. Word has length 30 [2021-06-05 06:22:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:32,028 INFO L482 AbstractCegarLoop]: Abstraction has 7065 states and 24140 transitions. [2021-06-05 06:22:32,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 24140 transitions. [2021-06-05 06:22:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:32,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:32,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:32,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 06:22:32,238 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:32,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:32,238 INFO L82 PathProgramCache]: Analyzing trace with hash -8608016, now seen corresponding path program 71 times [2021-06-05 06:22:32,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:32,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442481663] [2021-06-05 06:22:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:32,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442481663] [2021-06-05 06:22:32,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442481663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:32,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893657325] [2021-06-05 06:22:32,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:32,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:22:32,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:22:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:32,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:32,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:32,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:22:32,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:32,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:32,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:32,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:22:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:32,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893657325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:32,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:32,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:22:32,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36028669] [2021-06-05 06:22:32,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:22:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:32,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:22:32,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:22:32,661 INFO L87 Difference]: Start difference. First operand 7065 states and 24140 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:33,460 INFO L93 Difference]: Finished difference Result 8952 states and 29987 transitions. [2021-06-05 06:22:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:22:33,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:33,475 INFO L225 Difference]: With dead ends: 8952 [2021-06-05 06:22:33,475 INFO L226 Difference]: Without dead ends: 8937 [2021-06-05 06:22:33,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 654.1ms TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:22:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8937 states. [2021-06-05 06:22:33,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8937 to 7070. [2021-06-05 06:22:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 7069 states have (on average 3.417032112038478) internal successors, (24155), 7069 states have internal predecessors, (24155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 24155 transitions. [2021-06-05 06:22:33,587 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 24155 transitions. Word has length 30 [2021-06-05 06:22:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:33,587 INFO L482 AbstractCegarLoop]: Abstraction has 7070 states and 24155 transitions. [2021-06-05 06:22:33,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 24155 transitions. [2021-06-05 06:22:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:33,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:33,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:33,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 06:22:33,797 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1865789292, now seen corresponding path program 72 times [2021-06-05 06:22:33,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:33,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800596908] [2021-06-05 06:22:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:33,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800596908] [2021-06-05 06:22:33,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800596908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433191275] [2021-06-05 06:22:33,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:34,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:22:34,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:34,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:22:34,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:34,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:34,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:34,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:34,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 06:22:34,182 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:34,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:34,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:34,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:22:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:34,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433191275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:34,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:34,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:22:34,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54546120] [2021-06-05 06:22:34,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:22:34,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:34,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:22:34,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:22:34,249 INFO L87 Difference]: Start difference. First operand 7070 states and 24155 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:35,997 INFO L93 Difference]: Finished difference Result 9351 states and 31228 transitions. [2021-06-05 06:22:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:22:35,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:36,013 INFO L225 Difference]: With dead ends: 9351 [2021-06-05 06:22:36,014 INFO L226 Difference]: Without dead ends: 9316 [2021-06-05 06:22:36,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1203.5ms TimeCoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:22:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-06-05 06:22:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7069. [2021-06-05 06:22:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-06-05 06:22:36,143 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-06-05 06:22:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:36,143 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-06-05 06:22:36,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-06-05 06:22:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:36,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:36,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:36,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 06:22:36,396 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:36,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:36,396 INFO L82 PathProgramCache]: Analyzing trace with hash -43636904, now seen corresponding path program 73 times [2021-06-05 06:22:36,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:36,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018227380] [2021-06-05 06:22:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:36,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:36,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018227380] [2021-06-05 06:22:36,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018227380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:36,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152197828] [2021-06-05 06:22:36,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:22:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:36,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:36,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:36,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:22:36,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:36,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:36,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:36,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:22:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:36,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152197828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:36,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:36,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:22:36,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229415327] [2021-06-05 06:22:36,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:22:36,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:22:36,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:22:36,828 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:38,083 INFO L93 Difference]: Finished difference Result 9314 states and 31182 transitions. [2021-06-05 06:22:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:22:38,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:38,099 INFO L225 Difference]: With dead ends: 9314 [2021-06-05 06:22:38,099 INFO L226 Difference]: Without dead ends: 9299 [2021-06-05 06:22:38,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 995.5ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:22:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9299 states. [2021-06-05 06:22:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9299 to 7071. [2021-06-05 06:22:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.4164073550212164) internal successors, (24154), 7070 states have internal predecessors, (24154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 24154 transitions. [2021-06-05 06:22:38,223 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 24154 transitions. Word has length 30 [2021-06-05 06:22:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:38,223 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 24154 transitions. [2021-06-05 06:22:38,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 24154 transitions. [2021-06-05 06:22:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:38,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:38,232 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:38,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:38,433 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash 154706472, now seen corresponding path program 74 times [2021-06-05 06:22:38,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:38,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123534182] [2021-06-05 06:22:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:38,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:38,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123534182] [2021-06-05 06:22:38,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123534182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:38,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916365980] [2021-06-05 06:22:38,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:38,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:38,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:38,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:22:38,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:38,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:38,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:38,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:38,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:22:38,805 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:38,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:38,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:38,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:23 [2021-06-05 06:22:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:38,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916365980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:38,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:38,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:22:38,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903006099] [2021-06-05 06:22:38,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:22:38,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:38,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:22:38,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:22:38,860 INFO L87 Difference]: Start difference. First operand 7071 states and 24154 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:40,590 INFO L93 Difference]: Finished difference Result 9796 states and 32685 transitions. [2021-06-05 06:22:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:22:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:40,605 INFO L225 Difference]: With dead ends: 9796 [2021-06-05 06:22:40,605 INFO L226 Difference]: Without dead ends: 9781 [2021-06-05 06:22:40,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1292.4ms TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:22:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-06-05 06:22:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 7069. [2021-06-05 06:22:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-06-05 06:22:40,735 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-06-05 06:22:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:40,735 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-06-05 06:22:40,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-06-05 06:22:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:40,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:40,745 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:40,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 06:22:40,946 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1280772920, now seen corresponding path program 75 times [2021-06-05 06:22:40,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:40,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370693068] [2021-06-05 06:22:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:41,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:41,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370693068] [2021-06-05 06:22:41,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370693068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:41,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073359967] [2021-06-05 06:22:41,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:41,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:22:41,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:41,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:22:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:41,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:41,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:41,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:22:41,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:41,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:41,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:41,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 06:22:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:41,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073359967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:41,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:41,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:22:41,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335458716] [2021-06-05 06:22:41,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:22:41,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:22:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:22:41,385 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:42,886 INFO L93 Difference]: Finished difference Result 11687 states and 38279 transitions. [2021-06-05 06:22:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:22:42,886 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:42,905 INFO L225 Difference]: With dead ends: 11687 [2021-06-05 06:22:42,905 INFO L226 Difference]: Without dead ends: 11666 [2021-06-05 06:22:42,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1092.9ms TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:22:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11666 states. [2021-06-05 06:22:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11666 to 7054. [2021-06-05 06:22:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 7053 states have (on average 3.4162767616617042) internal successors, (24095), 7053 states have internal predecessors, (24095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 24095 transitions. [2021-06-05 06:22:43,039 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 24095 transitions. Word has length 30 [2021-06-05 06:22:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:43,039 INFO L482 AbstractCegarLoop]: Abstraction has 7054 states and 24095 transitions. [2021-06-05 06:22:43,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 24095 transitions. [2021-06-05 06:22:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:43,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:43,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:43,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 06:22:43,253 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash -575656810, now seen corresponding path program 76 times [2021-06-05 06:22:43,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:43,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081100870] [2021-06-05 06:22:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:43,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:43,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081100870] [2021-06-05 06:22:43,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081100870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:43,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070057642] [2021-06-05 06:22:43,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:43,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:43,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:22:43,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:43,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:43,762 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:22:43,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 56 [2021-06-05 06:22:43,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:43,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:43,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:43,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:3 [2021-06-05 06:22:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:43,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070057642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:43,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:43,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:22:43,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773129155] [2021-06-05 06:22:43,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:22:43,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:43,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:22:43,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:22:43,795 INFO L87 Difference]: Start difference. First operand 7054 states and 24095 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:45,255 INFO L93 Difference]: Finished difference Result 10880 states and 36101 transitions. [2021-06-05 06:22:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:22:45,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:45,273 INFO L225 Difference]: With dead ends: 10880 [2021-06-05 06:22:45,273 INFO L226 Difference]: Without dead ends: 10859 [2021-06-05 06:22:45,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 979.3ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:22:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2021-06-05 06:22:45,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 7061. [2021-06-05 06:22:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7061 states, 7060 states have (on average 3.41685552407932) internal successors, (24123), 7060 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7061 states to 7061 states and 24123 transitions. [2021-06-05 06:22:45,391 INFO L78 Accepts]: Start accepts. Automaton has 7061 states and 24123 transitions. Word has length 30 [2021-06-05 06:22:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:45,391 INFO L482 AbstractCegarLoop]: Abstraction has 7061 states and 24123 transitions. [2021-06-05 06:22:45,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7061 states and 24123 transitions. [2021-06-05 06:22:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:45,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:45,400 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:45,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 06:22:45,601 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:45,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1197451026, now seen corresponding path program 77 times [2021-06-05 06:22:45,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:45,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131844293] [2021-06-05 06:22:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:45,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:45,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131844293] [2021-06-05 06:22:45,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131844293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:45,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803793897] [2021-06-05 06:22:45,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:45,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:22:45,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:45,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:22:45,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:46,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:46,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:22:46,050 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:46,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:46,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:46,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:22:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:46,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803793897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:46,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:46,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 06:22:46,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692944868] [2021-06-05 06:22:46,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:22:46,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:46,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:22:46,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:22:46,101 INFO L87 Difference]: Start difference. First operand 7061 states and 24123 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:48,241 INFO L93 Difference]: Finished difference Result 11290 states and 37387 transitions. [2021-06-05 06:22:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:22:48,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:48,260 INFO L225 Difference]: With dead ends: 11290 [2021-06-05 06:22:48,260 INFO L226 Difference]: Without dead ends: 11254 [2021-06-05 06:22:48,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1564.9ms TimeCoverageRelationStatistics Valid=553, Invalid=3353, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:22:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11254 states. [2021-06-05 06:22:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11254 to 7068. [2021-06-05 06:22:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 3.4184236592613555) internal successors, (24158), 7067 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 24158 transitions. [2021-06-05 06:22:48,387 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 24158 transitions. Word has length 30 [2021-06-05 06:22:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:48,388 INFO L482 AbstractCegarLoop]: Abstraction has 7068 states and 24158 transitions. [2021-06-05 06:22:48,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 24158 transitions. [2021-06-05 06:22:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:48,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:48,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:48,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 06:22:48,597 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash 479008484, now seen corresponding path program 78 times [2021-06-05 06:22:48,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:48,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098039042] [2021-06-05 06:22:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:48,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:48,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098039042] [2021-06-05 06:22:48,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098039042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:48,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737257664] [2021-06-05 06:22:48,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:48,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:22:48,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:48,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:22:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:49,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:49,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:49,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:22:49,023 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:49,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:49,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:49,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:22:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:49,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737257664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:49,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:49,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:22:49,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116973449] [2021-06-05 06:22:49,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:22:49,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:49,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:22:49,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:22:49,076 INFO L87 Difference]: Start difference. First operand 7068 states and 24158 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:50,656 INFO L93 Difference]: Finished difference Result 11632 states and 38612 transitions. [2021-06-05 06:22:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:22:50,656 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:50,676 INFO L225 Difference]: With dead ends: 11632 [2021-06-05 06:22:50,676 INFO L226 Difference]: Without dead ends: 11582 [2021-06-05 06:22:50,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 988.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:22:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11582 states. [2021-06-05 06:22:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11582 to 7063. [2021-06-05 06:22:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7063 states, 7062 states have (on average 3.4170206740300197) internal successors, (24131), 7062 states have internal predecessors, (24131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7063 states to 7063 states and 24131 transitions. [2021-06-05 06:22:50,808 INFO L78 Accepts]: Start accepts. Automaton has 7063 states and 24131 transitions. Word has length 30 [2021-06-05 06:22:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:50,808 INFO L482 AbstractCegarLoop]: Abstraction has 7063 states and 24131 transitions. [2021-06-05 06:22:50,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7063 states and 24131 transitions. [2021-06-05 06:22:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:50,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:50,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:51,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 06:22:51,017 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:51,018 INFO L82 PathProgramCache]: Analyzing trace with hash -327230800, now seen corresponding path program 79 times [2021-06-05 06:22:51,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:51,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328541000] [2021-06-05 06:22:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:51,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:51,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328541000] [2021-06-05 06:22:51,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328541000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:51,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187702799] [2021-06-05 06:22:51,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:22:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:51,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:51,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:51,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:22:51,411 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:51,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:51,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:51,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:22:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187702799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:51,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:51,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:22:51,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007271817] [2021-06-05 06:22:51,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:22:51,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:22:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:22:51,463 INFO L87 Difference]: Start difference. First operand 7063 states and 24131 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:52,618 INFO L93 Difference]: Finished difference Result 11229 states and 37406 transitions. [2021-06-05 06:22:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:22:52,618 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:52,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:52,635 INFO L225 Difference]: With dead ends: 11229 [2021-06-05 06:22:52,636 INFO L226 Difference]: Without dead ends: 11179 [2021-06-05 06:22:52,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 796.8ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:22:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-06-05 06:22:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 7078. [2021-06-05 06:22:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7077 states have (on average 3.4183976261127595) internal successors, (24192), 7077 states have internal predecessors, (24192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 24192 transitions. [2021-06-05 06:22:52,762 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 24192 transitions. Word has length 30 [2021-06-05 06:22:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:52,762 INFO L482 AbstractCegarLoop]: Abstraction has 7078 states and 24192 transitions. [2021-06-05 06:22:52,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 24192 transitions. [2021-06-05 06:22:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:52,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:52,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:52,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:52,971 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:52,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:52,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1558548792, now seen corresponding path program 80 times [2021-06-05 06:22:52,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:52,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303284877] [2021-06-05 06:22:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:53,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:53,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303284877] [2021-06-05 06:22:53,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303284877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:53,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280757437] [2021-06-05 06:22:53,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:53,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:53,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:53,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:22:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:53,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:53,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:53,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:53,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:22:53,366 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:53,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:53,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:53,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-06-05 06:22:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:53,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280757437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:53,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:53,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:22:53,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861894504] [2021-06-05 06:22:53,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:22:53,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:53,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:22:53,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:22:53,439 INFO L87 Difference]: Start difference. First operand 7078 states and 24192 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:54,673 INFO L93 Difference]: Finished difference Result 10337 states and 34372 transitions. [2021-06-05 06:22:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:22:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:54,690 INFO L225 Difference]: With dead ends: 10337 [2021-06-05 06:22:54,691 INFO L226 Difference]: Without dead ends: 10256 [2021-06-05 06:22:54,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 959.2ms TimeCoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:22:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10256 states. [2021-06-05 06:22:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10256 to 7079. [2021-06-05 06:22:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-06-05 06:22:54,839 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-06-05 06:22:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:54,839 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-06-05 06:22:54,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-06-05 06:22:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:54,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:54,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:55,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 06:22:55,049 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:55,049 INFO L82 PathProgramCache]: Analyzing trace with hash 211718524, now seen corresponding path program 81 times [2021-06-05 06:22:55,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:55,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588761181] [2021-06-05 06:22:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:55,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:55,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588761181] [2021-06-05 06:22:55,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588761181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:55,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812134861] [2021-06-05 06:22:55,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:55,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:22:55,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:22:55,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:55,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:55,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:22:55,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:55,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:55,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:55,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:50 [2021-06-05 06:22:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:55,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812134861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:55,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:55,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:22:55,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248363422] [2021-06-05 06:22:55,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:22:55,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:55,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:22:55,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:22:55,540 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:56,236 INFO L93 Difference]: Finished difference Result 8987 states and 30270 transitions. [2021-06-05 06:22:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:22:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:56,250 INFO L225 Difference]: With dead ends: 8987 [2021-06-05 06:22:56,251 INFO L226 Difference]: Without dead ends: 8962 [2021-06-05 06:22:56,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 564.6ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:22:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-06-05 06:22:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 7079. [2021-06-05 06:22:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-06-05 06:22:56,364 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-06-05 06:22:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:56,365 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-06-05 06:22:56,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-06-05 06:22:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:56,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:56,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:56,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 06:22:56,574 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:56,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1547132172, now seen corresponding path program 82 times [2021-06-05 06:22:56,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:56,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330983946] [2021-06-05 06:22:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:56,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:56,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330983946] [2021-06-05 06:22:56,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330983946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:56,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992185091] [2021-06-05 06:22:56,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:56,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:56,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:56,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:22:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:56,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:56,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:56,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:22:56,976 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:56,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:56,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:56,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:22:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:57,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992185091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:57,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:57,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:22:57,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917274487] [2021-06-05 06:22:57,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:22:57,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:57,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:22:57,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:22:57,029 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:58,161 INFO L93 Difference]: Finished difference Result 9428 states and 31713 transitions. [2021-06-05 06:22:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:22:58,162 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:58,176 INFO L225 Difference]: With dead ends: 9428 [2021-06-05 06:22:58,176 INFO L226 Difference]: Without dead ends: 9413 [2021-06-05 06:22:58,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 801.1ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:22:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9413 states. [2021-06-05 06:22:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9413 to 7076. [2021-06-05 06:22:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.417950530035336) internal successors, (24182), 7075 states have internal predecessors, (24182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24182 transitions. [2021-06-05 06:22:58,315 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24182 transitions. Word has length 30 [2021-06-05 06:22:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:58,315 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24182 transitions. [2021-06-05 06:22:58,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24182 transitions. [2021-06-05 06:22:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:58,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:58,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:58,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-06-05 06:22:58,524 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:58,525 INFO L82 PathProgramCache]: Analyzing trace with hash 790201086, now seen corresponding path program 83 times [2021-06-05 06:22:58,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:58,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040127544] [2021-06-05 06:22:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:58,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:58,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040127544] [2021-06-05 06:22:58,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040127544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:58,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193447945] [2021-06-05 06:22:58,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:58,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:22:58,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:22:58,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:58,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:58,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:58,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:22:58,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:58,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:58,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:22:58,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:22:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:58,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193447945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:58,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:58,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:22:58,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102171522] [2021-06-05 06:22:58,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:22:58,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:58,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:22:58,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:22:58,982 INFO L87 Difference]: Start difference. First operand 7076 states and 24182 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:59,463 INFO L93 Difference]: Finished difference Result 8712 states and 29355 transitions. [2021-06-05 06:22:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:22:59,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:22:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:59,477 INFO L225 Difference]: With dead ends: 8712 [2021-06-05 06:22:59,477 INFO L226 Difference]: Without dead ends: 8691 [2021-06-05 06:22:59,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:22:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8691 states. [2021-06-05 06:22:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8691 to 7081. [2021-06-05 06:22:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 3.418502824858757) internal successors, (24203), 7080 states have internal predecessors, (24203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 24203 transitions. [2021-06-05 06:22:59,580 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 24203 transitions. Word has length 30 [2021-06-05 06:22:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:59,580 INFO L482 AbstractCegarLoop]: Abstraction has 7081 states and 24203 transitions. [2021-06-05 06:22:59,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 24203 transitions. [2021-06-05 06:22:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:22:59,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:59,589 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:59,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 06:22:59,789 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:59,789 INFO L82 PathProgramCache]: Analyzing trace with hash 988544462, now seen corresponding path program 84 times [2021-06-05 06:22:59,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:59,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543226062] [2021-06-05 06:22:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:59,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:59,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543226062] [2021-06-05 06:22:59,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543226062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:59,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358444650] [2021-06-05 06:22:59,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:00,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:23:00,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:00,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:23:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:00,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:00,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:23:00,232 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:00,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:00,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:00,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:25 [2021-06-05 06:23:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:00,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358444650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:00,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:00,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 06:23:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859314297] [2021-06-05 06:23:00,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:23:00,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:23:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:23:00,315 INFO L87 Difference]: Start difference. First operand 7081 states and 24203 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:02,388 INFO L93 Difference]: Finished difference Result 9784 states and 32690 transitions. [2021-06-05 06:23:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:23:02,388 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:02,404 INFO L225 Difference]: With dead ends: 9784 [2021-06-05 06:23:02,404 INFO L226 Difference]: Without dead ends: 9744 [2021-06-05 06:23:02,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1283.1ms TimeCoverageRelationStatistics Valid=348, Invalid=2514, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:23:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2021-06-05 06:23:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 7077. [2021-06-05 06:23:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.4166195590729225) internal successors, (24176), 7076 states have internal predecessors, (24176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 24176 transitions. [2021-06-05 06:23:02,532 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 24176 transitions. Word has length 30 [2021-06-05 06:23:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:02,533 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 24176 transitions. [2021-06-05 06:23:02,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 24176 transitions. [2021-06-05 06:23:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:02,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:02,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:02,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 06:23:02,741 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1508282850, now seen corresponding path program 85 times [2021-06-05 06:23:02,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:02,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542300359] [2021-06-05 06:23:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:02,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:02,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542300359] [2021-06-05 06:23:02,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542300359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:02,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783073393] [2021-06-05 06:23:02,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:02,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:23:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:03,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:03,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:23:03,129 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:03,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:03,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:03,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:23:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:03,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783073393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:03,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:03,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:23:03,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795424695] [2021-06-05 06:23:03,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:03,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:03,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:03,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:03,211 INFO L87 Difference]: Start difference. First operand 7077 states and 24176 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:03,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:03,722 INFO L93 Difference]: Finished difference Result 8973 states and 30216 transitions. [2021-06-05 06:23:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:23:03,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:03,736 INFO L225 Difference]: With dead ends: 8973 [2021-06-05 06:23:03,736 INFO L226 Difference]: Without dead ends: 8938 [2021-06-05 06:23:03,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:23:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2021-06-05 06:23:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 7076. [2021-06-05 06:23:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.416678445229682) internal successors, (24173), 7075 states have internal predecessors, (24173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24173 transitions. [2021-06-05 06:23:03,846 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24173 transitions. Word has length 30 [2021-06-05 06:23:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:03,846 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24173 transitions. [2021-06-05 06:23:03,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24173 transitions. [2021-06-05 06:23:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:03,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:03,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:04,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:04,055 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:04,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1182471836, now seen corresponding path program 86 times [2021-06-05 06:23:04,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:04,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376649369] [2021-06-05 06:23:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:04,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:04,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376649369] [2021-06-05 06:23:04,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376649369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:04,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614646009] [2021-06-05 06:23:04,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:04,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:04,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:23:04,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:04,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:04,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:04,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:23:04,429 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:04,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:04,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:04,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:23:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:04,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614646009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:04,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:04,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:23:04,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277891700] [2021-06-05 06:23:04,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:04,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:04,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:04,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:04,479 INFO L87 Difference]: Start difference. First operand 7076 states and 24173 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:07,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:07,173 INFO L93 Difference]: Finished difference Result 12654 states and 41623 transitions. [2021-06-05 06:23:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:23:07,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:07,194 INFO L225 Difference]: With dead ends: 12654 [2021-06-05 06:23:07,194 INFO L226 Difference]: Without dead ends: 12575 [2021-06-05 06:23:07,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 1997.9ms TimeCoverageRelationStatistics Valid=754, Invalid=4358, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:23:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-06-05 06:23:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 7133. [2021-06-05 06:23:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7133 states, 7132 states have (on average 3.415171060011217) internal successors, (24357), 7132 states have internal predecessors, (24357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7133 states to 7133 states and 24357 transitions. [2021-06-05 06:23:07,340 INFO L78 Accepts]: Start accepts. Automaton has 7133 states and 24357 transitions. Word has length 30 [2021-06-05 06:23:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:07,340 INFO L482 AbstractCegarLoop]: Abstraction has 7133 states and 24357 transitions. [2021-06-05 06:23:07,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7133 states and 24357 transitions. [2021-06-05 06:23:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:07,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:07,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:07,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:07,549 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash -668317764, now seen corresponding path program 87 times [2021-06-05 06:23:07,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:07,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367028267] [2021-06-05 06:23:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:07,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:07,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367028267] [2021-06-05 06:23:07,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367028267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:07,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84540958] [2021-06-05 06:23:07,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:07,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:23:07,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:23:07,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:07,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:07,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:07,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:23:07,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:07,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:07,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:07,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:65 [2021-06-05 06:23:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:08,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84540958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:08,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:08,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:23:08,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449221399] [2021-06-05 06:23:08,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:08,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:08,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:08,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:08,015 INFO L87 Difference]: Start difference. First operand 7133 states and 24357 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:09,472 INFO L93 Difference]: Finished difference Result 10504 states and 34841 transitions. [2021-06-05 06:23:09,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:23:09,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:09,489 INFO L225 Difference]: With dead ends: 10504 [2021-06-05 06:23:09,489 INFO L226 Difference]: Without dead ends: 10458 [2021-06-05 06:23:09,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1226.9ms TimeCoverageRelationStatistics Valid=430, Invalid=2540, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:23:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10458 states. [2021-06-05 06:23:09,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10458 to 7177. [2021-06-05 06:23:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-06-05 06:23:09,615 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-06-05 06:23:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:09,616 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-06-05 06:23:09,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-06-05 06:23:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:09,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:09,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:09,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:09,825 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash -221047002, now seen corresponding path program 88 times [2021-06-05 06:23:09,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:09,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792226423] [2021-06-05 06:23:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:09,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:09,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792226423] [2021-06-05 06:23:09,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792226423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:09,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553830035] [2021-06-05 06:23:09,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:10,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:23:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:10,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:10,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:10,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:23:10,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:10,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:10,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:23:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:10,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553830035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:10,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:10,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:23:10,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033253127] [2021-06-05 06:23:10,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:10,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:10,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:10,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:10,298 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:11,503 INFO L93 Difference]: Finished difference Result 8909 states and 29971 transitions. [2021-06-05 06:23:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:23:11,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:11,517 INFO L225 Difference]: With dead ends: 8909 [2021-06-05 06:23:11,517 INFO L226 Difference]: Without dead ends: 8888 [2021-06-05 06:23:11,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 651.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:23:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8888 states. [2021-06-05 06:23:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8888 to 7177. [2021-06-05 06:23:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-06-05 06:23:11,621 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-06-05 06:23:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:11,621 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-06-05 06:23:11,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-06-05 06:23:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:11,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:11,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:11,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 06:23:11,831 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash 43416822, now seen corresponding path program 89 times [2021-06-05 06:23:11,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:11,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595533349] [2021-06-05 06:23:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:12,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:12,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595533349] [2021-06-05 06:23:12,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595533349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:12,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812399025] [2021-06-05 06:23:12,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:12,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:23:12,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:12,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:23:12,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:12,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:12,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:23:12,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:12,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:12,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:12,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-06-05 06:23:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:12,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812399025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:12,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:12,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 06:23:12,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584430278] [2021-06-05 06:23:12,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:12,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:12,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:12,580 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:14,863 INFO L93 Difference]: Finished difference Result 9613 states and 32165 transitions. [2021-06-05 06:23:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:23:14,863 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:14,878 INFO L225 Difference]: With dead ends: 9613 [2021-06-05 06:23:14,878 INFO L226 Difference]: Without dead ends: 9533 [2021-06-05 06:23:14,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1799.3ms TimeCoverageRelationStatistics Valid=343, Invalid=2107, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:23:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-06-05 06:23:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 7204. [2021-06-05 06:23:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7204 states, 7203 states have (on average 3.414549493266694) internal successors, (24595), 7203 states have internal predecessors, (24595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 24595 transitions. [2021-06-05 06:23:14,988 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 24595 transitions. Word has length 30 [2021-06-05 06:23:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:14,988 INFO L482 AbstractCegarLoop]: Abstraction has 7204 states and 24595 transitions. [2021-06-05 06:23:14,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 24595 transitions. [2021-06-05 06:23:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:14,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:14,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:15,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 06:23:15,198 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash -572506508, now seen corresponding path program 90 times [2021-06-05 06:23:15,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:15,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617909630] [2021-06-05 06:23:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:15,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:15,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617909630] [2021-06-05 06:23:15,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617909630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:15,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576881999] [2021-06-05 06:23:15,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:15,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:23:15,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:15,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:23:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:15,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:23:15,685 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:15,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:15,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:15,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:23:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:15,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576881999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:15,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:15,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:23:15,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912003820] [2021-06-05 06:23:15,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:15,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:15,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:15,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:15,765 INFO L87 Difference]: Start difference. First operand 7204 states and 24595 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:18,178 INFO L93 Difference]: Finished difference Result 10561 states and 34976 transitions. [2021-06-05 06:23:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:23:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:18,195 INFO L225 Difference]: With dead ends: 10561 [2021-06-05 06:23:18,195 INFO L226 Difference]: Without dead ends: 10514 [2021-06-05 06:23:18,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1723.1ms TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:23:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-06-05 06:23:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 7197. [2021-06-05 06:23:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 3.415230683713174) internal successors, (24576), 7196 states have internal predecessors, (24576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 24576 transitions. [2021-06-05 06:23:18,322 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 24576 transitions. Word has length 30 [2021-06-05 06:23:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:18,322 INFO L482 AbstractCegarLoop]: Abstraction has 7197 states and 24576 transitions. [2021-06-05 06:23:18,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 24576 transitions. [2021-06-05 06:23:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:18,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:18,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:18,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 06:23:18,534 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:18,534 INFO L82 PathProgramCache]: Analyzing trace with hash -124071064, now seen corresponding path program 91 times [2021-06-05 06:23:18,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:18,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262167902] [2021-06-05 06:23:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:18,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:18,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262167902] [2021-06-05 06:23:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262167902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:18,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099481775] [2021-06-05 06:23:18,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:18,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:23:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:19,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:19,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:23:19,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:19,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:19,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:19,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:23:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:19,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099481775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:19,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:19,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 06:23:19,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065849389] [2021-06-05 06:23:19,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:19,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:19,077 INFO L87 Difference]: Start difference. First operand 7197 states and 24576 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:20,265 INFO L93 Difference]: Finished difference Result 8814 states and 29558 transitions. [2021-06-05 06:23:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:23:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:20,279 INFO L225 Difference]: With dead ends: 8814 [2021-06-05 06:23:20,279 INFO L226 Difference]: Without dead ends: 8788 [2021-06-05 06:23:20,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 945.2ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:23:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-06-05 06:23:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 7205. [2021-06-05 06:23:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7205 states, 7204 states have (on average 3.4144919489172683) internal successors, (24598), 7204 states have internal predecessors, (24598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 24598 transitions. [2021-06-05 06:23:20,385 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 24598 transitions. Word has length 30 [2021-06-05 06:23:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:20,385 INFO L482 AbstractCegarLoop]: Abstraction has 7205 states and 24598 transitions. [2021-06-05 06:23:20,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 24598 transitions. [2021-06-05 06:23:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:20,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:20,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:20,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:20,595 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1414795236, now seen corresponding path program 92 times [2021-06-05 06:23:20,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:20,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044129225] [2021-06-05 06:23:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:20,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:20,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044129225] [2021-06-05 06:23:20,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044129225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:20,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193182504] [2021-06-05 06:23:20,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:20,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:20,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:20,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:23:20,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:21,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:21,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:23:21,014 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:21,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:21,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:23:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193182504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:21,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:21,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:23:21,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925370019] [2021-06-05 06:23:21,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:21,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:21,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:21,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:21,065 INFO L87 Difference]: Start difference. First operand 7205 states and 24598 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:24,358 INFO L93 Difference]: Finished difference Result 12224 states and 40164 transitions. [2021-06-05 06:23:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 06:23:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:24,379 INFO L225 Difference]: With dead ends: 12224 [2021-06-05 06:23:24,379 INFO L226 Difference]: Without dead ends: 12147 [2021-06-05 06:23:24,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 2504.3ms TimeCoverageRelationStatistics Valid=1026, Invalid=5946, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 06:23:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12147 states. [2021-06-05 06:23:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12147 to 7309. [2021-06-05 06:23:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7309 states, 7308 states have (on average 3.4143404488232076) internal successors, (24952), 7308 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7309 states to 7309 states and 24952 transitions. [2021-06-05 06:23:24,540 INFO L78 Accepts]: Start accepts. Automaton has 7309 states and 24952 transitions. Word has length 30 [2021-06-05 06:23:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:24,540 INFO L482 AbstractCegarLoop]: Abstraction has 7309 states and 24952 transitions. [2021-06-05 06:23:24,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7309 states and 24952 transitions. [2021-06-05 06:23:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:24,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:24,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:24,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:24,751 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash 781180196, now seen corresponding path program 93 times [2021-06-05 06:23:24,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:24,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261136544] [2021-06-05 06:23:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:24,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261136544] [2021-06-05 06:23:24,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261136544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093206091] [2021-06-05 06:23:24,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:25,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:23:25,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:25,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:23:25,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:25,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:25,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:23:25,197 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:25,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:25,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:25,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:23:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:25,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093206091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:25,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:25,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:23:25,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267120402] [2021-06-05 06:23:25,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:25,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:25,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:25,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:25,248 INFO L87 Difference]: Start difference. First operand 7309 states and 24952 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:27,952 INFO L93 Difference]: Finished difference Result 12077 states and 39682 transitions. [2021-06-05 06:23:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:23:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:27,971 INFO L225 Difference]: With dead ends: 12077 [2021-06-05 06:23:27,971 INFO L226 Difference]: Without dead ends: 11990 [2021-06-05 06:23:27,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2074.1ms TimeCoverageRelationStatistics Valid=929, Invalid=5077, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:23:27,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11990 states. [2021-06-05 06:23:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11990 to 7424. [2021-06-05 06:23:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7424 states, 7423 states have (on average 3.416004310925502) internal successors, (25357), 7423 states have internal predecessors, (25357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7424 states to 7424 states and 25357 transitions. [2021-06-05 06:23:28,123 INFO L78 Accepts]: Start accepts. Automaton has 7424 states and 25357 transitions. Word has length 30 [2021-06-05 06:23:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:28,123 INFO L482 AbstractCegarLoop]: Abstraction has 7424 states and 25357 transitions. [2021-06-05 06:23:28,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7424 states and 25357 transitions. [2021-06-05 06:23:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:28,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:28,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:28,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 06:23:28,333 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:28,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1722423664, now seen corresponding path program 94 times [2021-06-05 06:23:28,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:28,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047638980] [2021-06-05 06:23:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:28,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:28,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047638980] [2021-06-05 06:23:28,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047638980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:28,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619450065] [2021-06-05 06:23:28,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:28,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:28,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:28,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:23:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:28,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:28,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:28,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:23:28,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:28,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:28,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:28,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:23:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:28,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619450065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:28,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:28,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:23:28,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233239626] [2021-06-05 06:23:28,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:28,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:28,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:28,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:28,874 INFO L87 Difference]: Start difference. First operand 7424 states and 25357 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:31,297 INFO L93 Difference]: Finished difference Result 10675 states and 35520 transitions. [2021-06-05 06:23:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:23:31,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:31,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:31,314 INFO L225 Difference]: With dead ends: 10675 [2021-06-05 06:23:31,314 INFO L226 Difference]: Without dead ends: 10642 [2021-06-05 06:23:31,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1932.2ms TimeCoverageRelationStatistics Valid=612, Invalid=3944, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:23:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10642 states. [2021-06-05 06:23:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10642 to 7435. [2021-06-05 06:23:31,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 7434 states have (on average 3.4170029593758406) internal successors, (25402), 7434 states have internal predecessors, (25402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 25402 transitions. [2021-06-05 06:23:31,470 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 25402 transitions. Word has length 30 [2021-06-05 06:23:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:31,470 INFO L482 AbstractCegarLoop]: Abstraction has 7435 states and 25402 transitions. [2021-06-05 06:23:31,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 25402 transitions. [2021-06-05 06:23:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:31,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:31,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:31,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 06:23:31,679 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:31,680 INFO L82 PathProgramCache]: Analyzing trace with hash 344478350, now seen corresponding path program 95 times [2021-06-05 06:23:31,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:31,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347835089] [2021-06-05 06:23:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:31,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:31,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347835089] [2021-06-05 06:23:31,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347835089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:31,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291491214] [2021-06-05 06:23:31,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:31,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:23:31,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:31,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:23:31,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:32,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:32,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:23:32,146 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:32,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:32,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:32,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:23:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:32,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291491214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:32,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:32,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:23:32,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824469858] [2021-06-05 06:23:32,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:32,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:32,199 INFO L87 Difference]: Start difference. First operand 7435 states and 25402 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:33,547 INFO L93 Difference]: Finished difference Result 10176 states and 34003 transitions. [2021-06-05 06:23:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:23:33,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:33,563 INFO L225 Difference]: With dead ends: 10176 [2021-06-05 06:23:33,563 INFO L226 Difference]: Without dead ends: 10123 [2021-06-05 06:23:33,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1057.3ms TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:23:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-06-05 06:23:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 7439. [2021-06-05 06:23:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 3.4167787039526756) internal successors, (25414), 7438 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 25414 transitions. [2021-06-05 06:23:33,690 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 25414 transitions. Word has length 30 [2021-06-05 06:23:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:33,690 INFO L482 AbstractCegarLoop]: Abstraction has 7439 states and 25414 transitions. [2021-06-05 06:23:33,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 25414 transitions. [2021-06-05 06:23:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:33,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:33,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:33,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:33,900 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:33,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2112307908, now seen corresponding path program 96 times [2021-06-05 06:23:33,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:33,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803604749] [2021-06-05 06:23:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:34,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:34,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803604749] [2021-06-05 06:23:34,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803604749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:34,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165098584] [2021-06-05 06:23:34,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:34,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:23:34,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:34,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:23:34,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:34,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:34,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:34,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:34,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 06:23:34,325 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:34,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:34,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:34,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:23:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:34,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165098584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:34,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:34,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:23:34,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573877493] [2021-06-05 06:23:34,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:23:34,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:34,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:23:34,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:23:34,396 INFO L87 Difference]: Start difference. First operand 7439 states and 25414 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:34,984 INFO L93 Difference]: Finished difference Result 9163 states and 30845 transitions. [2021-06-05 06:23:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:23:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:34,997 INFO L225 Difference]: With dead ends: 9163 [2021-06-05 06:23:34,997 INFO L226 Difference]: Without dead ends: 9128 [2021-06-05 06:23:34,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:23:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9128 states. [2021-06-05 06:23:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9128 to 7444. [2021-06-05 06:23:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 3.4167674324869006) internal successors, (25431), 7443 states have internal predecessors, (25431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 25431 transitions. [2021-06-05 06:23:35,103 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 25431 transitions. Word has length 30 [2021-06-05 06:23:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:35,103 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 25431 transitions. [2021-06-05 06:23:35,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 25431 transitions. [2021-06-05 06:23:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:35,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:35,113 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:35,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:35,313 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:35,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash 697570062, now seen corresponding path program 97 times [2021-06-05 06:23:35,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:35,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901323273] [2021-06-05 06:23:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:35,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:35,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901323273] [2021-06-05 06:23:35,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901323273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:35,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551204224] [2021-06-05 06:23:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:35,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:23:35,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:35,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:35,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:23:35,716 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:35,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:35,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:35,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:23:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:35,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551204224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:35,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:35,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:23:35,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69552183] [2021-06-05 06:23:35,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:23:35,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:35,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:23:35,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:23:35,766 INFO L87 Difference]: Start difference. First operand 7444 states and 25431 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:36,410 INFO L93 Difference]: Finished difference Result 9484 states and 31723 transitions. [2021-06-05 06:23:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:23:36,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:36,424 INFO L225 Difference]: With dead ends: 9484 [2021-06-05 06:23:36,424 INFO L226 Difference]: Without dead ends: 9449 [2021-06-05 06:23:36,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:23:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-06-05 06:23:36,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 7453. [2021-06-05 06:23:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.416935050993022) internal successors, (25463), 7452 states have internal predecessors, (25463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 25463 transitions. [2021-06-05 06:23:36,543 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 25463 transitions. Word has length 30 [2021-06-05 06:23:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:36,543 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 25463 transitions. [2021-06-05 06:23:36,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 25463 transitions. [2021-06-05 06:23:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:36,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:36,553 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:36,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:36,757 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:36,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash -992372842, now seen corresponding path program 98 times [2021-06-05 06:23:36,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:36,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024935111] [2021-06-05 06:23:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:36,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:36,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024935111] [2021-06-05 06:23:36,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024935111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:36,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448104214] [2021-06-05 06:23:36,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:36,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:36,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:23:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:37,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:37,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:23:37,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:37,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:23:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:37,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448104214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:37,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:37,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:23:37,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706545874] [2021-06-05 06:23:37,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:23:37,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:37,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:23:37,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:23:37,228 INFO L87 Difference]: Start difference. First operand 7453 states and 25463 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:37,765 INFO L93 Difference]: Finished difference Result 8692 states and 29282 transitions. [2021-06-05 06:23:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:23:37,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:37,778 INFO L225 Difference]: With dead ends: 8692 [2021-06-05 06:23:37,778 INFO L226 Difference]: Without dead ends: 8666 [2021-06-05 06:23:37,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 489.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:23:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2021-06-05 06:23:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 7455. [2021-06-05 06:23:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4174939629729004) internal successors, (25474), 7454 states have internal predecessors, (25474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25474 transitions. [2021-06-05 06:23:37,888 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25474 transitions. Word has length 30 [2021-06-05 06:23:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:37,888 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25474 transitions. [2021-06-05 06:23:37,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:37,888 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25474 transitions. [2021-06-05 06:23:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:37,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:37,898 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:38,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 06:23:38,101 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash 961333420, now seen corresponding path program 99 times [2021-06-05 06:23:38,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:38,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645017708] [2021-06-05 06:23:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:38,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:38,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645017708] [2021-06-05 06:23:38,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645017708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:38,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266222525] [2021-06-05 06:23:38,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:38,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:23:38,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:23:38,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:38,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:38,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:23:38,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:38,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:38,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:38,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-06-05 06:23:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:38,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266222525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:38,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:38,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 06:23:38,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217670379] [2021-06-05 06:23:38,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:38,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:38,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:38,741 INFO L87 Difference]: Start difference. First operand 7455 states and 25474 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:41,777 INFO L93 Difference]: Finished difference Result 9935 states and 33090 transitions. [2021-06-05 06:23:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:23:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:41,792 INFO L225 Difference]: With dead ends: 9935 [2021-06-05 06:23:41,792 INFO L226 Difference]: Without dead ends: 9895 [2021-06-05 06:23:41,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1981.0ms TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:23:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2021-06-05 06:23:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 7459. [2021-06-05 06:23:41,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7459 states, 7458 states have (on average 3.417538213998391) internal successors, (25488), 7458 states have internal predecessors, (25488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7459 states to 7459 states and 25488 transitions. [2021-06-05 06:23:41,916 INFO L78 Accepts]: Start accepts. Automaton has 7459 states and 25488 transitions. Word has length 30 [2021-06-05 06:23:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:41,916 INFO L482 AbstractCegarLoop]: Abstraction has 7459 states and 25488 transitions. [2021-06-05 06:23:41,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 7459 states and 25488 transitions. [2021-06-05 06:23:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:41,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:41,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:42,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 06:23:42,166 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:42,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:42,167 INFO L82 PathProgramCache]: Analyzing trace with hash -542447488, now seen corresponding path program 100 times [2021-06-05 06:23:42,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:42,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431447514] [2021-06-05 06:23:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:42,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431447514] [2021-06-05 06:23:42,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431447514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448751486] [2021-06-05 06:23:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:42,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:23:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:42,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:42,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:42,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:23:42,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:42,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:42,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:42,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:23:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:42,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448751486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:42,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:42,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:23:42,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516229604] [2021-06-05 06:23:42,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:42,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:42,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:42,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:42,619 INFO L87 Difference]: Start difference. First operand 7459 states and 25488 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:43,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:43,548 INFO L93 Difference]: Finished difference Result 9448 states and 31860 transitions. [2021-06-05 06:23:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:23:43,548 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:43,562 INFO L225 Difference]: With dead ends: 9448 [2021-06-05 06:23:43,563 INFO L226 Difference]: Without dead ends: 9433 [2021-06-05 06:23:43,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 768.9ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:23:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-06-05 06:23:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7463. [2021-06-05 06:23:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7463 states, 7462 states have (on average 3.4178504422406863) internal successors, (25504), 7462 states have internal predecessors, (25504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7463 states to 7463 states and 25504 transitions. [2021-06-05 06:23:43,678 INFO L78 Accepts]: Start accepts. Automaton has 7463 states and 25504 transitions. Word has length 30 [2021-06-05 06:23:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:43,678 INFO L482 AbstractCegarLoop]: Abstraction has 7463 states and 25504 transitions. [2021-06-05 06:23:43,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 7463 states and 25504 transitions. [2021-06-05 06:23:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:43,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:43,687 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:43,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:43,888 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:43,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:43,888 INFO L82 PathProgramCache]: Analyzing trace with hash -796111322, now seen corresponding path program 101 times [2021-06-05 06:23:43,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:43,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967680082] [2021-06-05 06:23:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:44,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:44,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967680082] [2021-06-05 06:23:44,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967680082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:44,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356771790] [2021-06-05 06:23:44,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:44,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:23:44,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:23:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:44,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:44,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:44,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:23:44,331 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:44,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:44,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:44,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:23:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:44,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356771790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:44,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:44,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:23:44,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073636914] [2021-06-05 06:23:44,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:44,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:44,383 INFO L87 Difference]: Start difference. First operand 7463 states and 25504 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:45,461 INFO L93 Difference]: Finished difference Result 9840 states and 33135 transitions. [2021-06-05 06:23:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:23:45,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:45,480 INFO L225 Difference]: With dead ends: 9840 [2021-06-05 06:23:45,481 INFO L226 Difference]: Without dead ends: 9825 [2021-06-05 06:23:45,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 971.1ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:23:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9825 states. [2021-06-05 06:23:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9825 to 7460. [2021-06-05 06:23:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 7459 states have (on average 3.417482236224695) internal successors, (25491), 7459 states have internal predecessors, (25491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 25491 transitions. [2021-06-05 06:23:45,638 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 25491 transitions. Word has length 30 [2021-06-05 06:23:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:45,639 INFO L482 AbstractCegarLoop]: Abstraction has 7460 states and 25491 transitions. [2021-06-05 06:23:45,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 25491 transitions. [2021-06-05 06:23:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:45,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:45,648 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:45,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:45,848 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1339332396, now seen corresponding path program 102 times [2021-06-05 06:23:45,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:45,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780497146] [2021-06-05 06:23:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:46,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:46,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780497146] [2021-06-05 06:23:46,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780497146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:46,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488097289] [2021-06-05 06:23:46,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:46,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:23:46,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:46,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:23:46,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:46,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:46,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:46,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 06:23:46,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:46,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:46,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:46,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:48 [2021-06-05 06:23:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:46,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488097289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:46,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:46,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 06:23:46,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532327909] [2021-06-05 06:23:46,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:46,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:46,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:46,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:46,521 INFO L87 Difference]: Start difference. First operand 7460 states and 25491 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:48,901 INFO L93 Difference]: Finished difference Result 9693 states and 32346 transitions. [2021-06-05 06:23:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:23:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:48,917 INFO L225 Difference]: With dead ends: 9693 [2021-06-05 06:23:48,917 INFO L226 Difference]: Without dead ends: 9650 [2021-06-05 06:23:48,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1626.4ms TimeCoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:23:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2021-06-05 06:23:49,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 7448. [2021-06-05 06:23:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7448 states, 7447 states have (on average 3.4157378810259167) internal successors, (25437), 7447 states have internal predecessors, (25437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7448 states to 7448 states and 25437 transitions. [2021-06-05 06:23:49,052 INFO L78 Accepts]: Start accepts. Automaton has 7448 states and 25437 transitions. Word has length 30 [2021-06-05 06:23:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:49,052 INFO L482 AbstractCegarLoop]: Abstraction has 7448 states and 25437 transitions. [2021-06-05 06:23:49,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 7448 states and 25437 transitions. [2021-06-05 06:23:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:49,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:49,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:49,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:49,263 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:49,263 INFO L82 PathProgramCache]: Analyzing trace with hash -508670674, now seen corresponding path program 103 times [2021-06-05 06:23:49,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:49,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196696656] [2021-06-05 06:23:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:49,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:49,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196696656] [2021-06-05 06:23:49,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196696656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:49,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755286114] [2021-06-05 06:23:49,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:23:49,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:49,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:49,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:23:49,741 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:49,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:49,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:49,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:23:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:49,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755286114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:49,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:49,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:23:49,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869963178] [2021-06-05 06:23:49,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:49,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:49,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:49,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:49,795 INFO L87 Difference]: Start difference. First operand 7448 states and 25437 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:50,597 INFO L93 Difference]: Finished difference Result 9634 states and 32382 transitions. [2021-06-05 06:23:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:23:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:50,612 INFO L225 Difference]: With dead ends: 9634 [2021-06-05 06:23:50,613 INFO L226 Difference]: Without dead ends: 9615 [2021-06-05 06:23:50,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:23:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-06-05 06:23:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7445. [2021-06-05 06:23:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7445 states, 7444 states have (on average 3.415368081676518) internal successors, (25424), 7444 states have internal predecessors, (25424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7445 states to 7445 states and 25424 transitions. [2021-06-05 06:23:50,734 INFO L78 Accepts]: Start accepts. Automaton has 7445 states and 25424 transitions. Word has length 30 [2021-06-05 06:23:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:50,734 INFO L482 AbstractCegarLoop]: Abstraction has 7445 states and 25424 transitions. [2021-06-05 06:23:50,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7445 states and 25424 transitions. [2021-06-05 06:23:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:50,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:50,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:50,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 06:23:50,943 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1583656386, now seen corresponding path program 104 times [2021-06-05 06:23:50,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:50,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100484865] [2021-06-05 06:23:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:51,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:51,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100484865] [2021-06-05 06:23:51,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100484865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:51,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142745810] [2021-06-05 06:23:51,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:51,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:51,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:51,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:23:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:51,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:51,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:51,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:51,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 06:23:51,343 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:51,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:51,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:51,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:23:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:51,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142745810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:51,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:51,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:23:51,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268125958] [2021-06-05 06:23:51,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:23:51,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:51,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:23:51,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:23:51,445 INFO L87 Difference]: Start difference. First operand 7445 states and 25424 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:52,415 INFO L93 Difference]: Finished difference Result 9544 states and 32087 transitions. [2021-06-05 06:23:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:23:52,415 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:52,432 INFO L225 Difference]: With dead ends: 9544 [2021-06-05 06:23:52,432 INFO L226 Difference]: Without dead ends: 9518 [2021-06-05 06:23:52,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 797.9ms TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:23:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-06-05 06:23:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7416. [2021-06-05 06:23:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 7415 states have (on average 3.4163182737693862) internal successors, (25332), 7415 states have internal predecessors, (25332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 25332 transitions. [2021-06-05 06:23:52,562 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 25332 transitions. Word has length 30 [2021-06-05 06:23:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:52,563 INFO L482 AbstractCegarLoop]: Abstraction has 7416 states and 25332 transitions. [2021-06-05 06:23:52,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 25332 transitions. [2021-06-05 06:23:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:52,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:52,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:52,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:52,777 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash -416146950, now seen corresponding path program 105 times [2021-06-05 06:23:52,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:52,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434559407] [2021-06-05 06:23:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:53,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:53,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434559407] [2021-06-05 06:23:53,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434559407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:53,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683010456] [2021-06-05 06:23:53,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:53,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:23:53,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:23:53,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:53,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:53,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:53,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 06:23:53,237 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:53,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:53,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:53,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:23:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:53,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683010456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:53,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:53,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:23:53,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18353843] [2021-06-05 06:23:53,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:23:53,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:53,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:23:53,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:23:53,306 INFO L87 Difference]: Start difference. First operand 7416 states and 25332 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:54,624 INFO L93 Difference]: Finished difference Result 9828 states and 32975 transitions. [2021-06-05 06:23:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:23:54,624 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:54,641 INFO L225 Difference]: With dead ends: 9828 [2021-06-05 06:23:54,641 INFO L226 Difference]: Without dead ends: 9778 [2021-06-05 06:23:54,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1089.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:23:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-06-05 06:23:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7415. [2021-06-05 06:23:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7415 states, 7414 states have (on average 3.4136768276234153) internal successors, (25309), 7414 states have internal predecessors, (25309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 25309 transitions. [2021-06-05 06:23:54,786 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 25309 transitions. Word has length 30 [2021-06-05 06:23:54,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:54,786 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 25309 transitions. [2021-06-05 06:23:54,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 25309 transitions. [2021-06-05 06:23:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:54,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:54,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:54,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:54,997 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash 519931620, now seen corresponding path program 106 times [2021-06-05 06:23:54,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:54,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952417636] [2021-06-05 06:23:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:55,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:55,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952417636] [2021-06-05 06:23:55,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952417636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:55,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383219364] [2021-06-05 06:23:55,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:55,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:55,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:23:55,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:55,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:55,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:55,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:23:55,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:55,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:55,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:55,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:23:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:55,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383219364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:55,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:55,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:23:55,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954870499] [2021-06-05 06:23:55,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:55,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:55,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:55,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:55,481 INFO L87 Difference]: Start difference. First operand 7415 states and 25309 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:56,302 INFO L93 Difference]: Finished difference Result 9105 states and 30683 transitions. [2021-06-05 06:23:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:23:56,302 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:56,318 INFO L225 Difference]: With dead ends: 9105 [2021-06-05 06:23:56,318 INFO L226 Difference]: Without dead ends: 9083 [2021-06-05 06:23:56,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:23:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-06-05 06:23:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 7434. [2021-06-05 06:23:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7434 states, 7433 states have (on average 3.4138302166016414) internal successors, (25375), 7433 states have internal predecessors, (25375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 25375 transitions. [2021-06-05 06:23:56,465 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 25375 transitions. Word has length 30 [2021-06-05 06:23:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:56,465 INFO L482 AbstractCegarLoop]: Abstraction has 7434 states and 25375 transitions. [2021-06-05 06:23:56,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 25375 transitions. [2021-06-05 06:23:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:56,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:56,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:56,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-06-05 06:23:56,676 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:56,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:56,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1969487540, now seen corresponding path program 107 times [2021-06-05 06:23:56,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:56,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382882777] [2021-06-05 06:23:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:56,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:56,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382882777] [2021-06-05 06:23:56,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382882777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:56,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463006324] [2021-06-05 06:23:56,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:56,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:23:56,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:56,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:23:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:57,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:57,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:57,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:23:57,099 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:57,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:57,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:57,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:23:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:57,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463006324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:57,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:57,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:23:57,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298596632] [2021-06-05 06:23:57,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:23:57,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:57,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:23:57,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:23:57,153 INFO L87 Difference]: Start difference. First operand 7434 states and 25375 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:58,205 INFO L93 Difference]: Finished difference Result 9842 states and 33046 transitions. [2021-06-05 06:23:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:23:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:23:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:58,221 INFO L225 Difference]: With dead ends: 9842 [2021-06-05 06:23:58,221 INFO L226 Difference]: Without dead ends: 9816 [2021-06-05 06:23:58,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 797.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:23:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-06-05 06:23:58,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7432. [2021-06-05 06:23:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 3.4128650248957073) internal successors, (25361), 7431 states have internal predecessors, (25361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 25361 transitions. [2021-06-05 06:23:58,350 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 25361 transitions. Word has length 30 [2021-06-05 06:23:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:58,351 INFO L482 AbstractCegarLoop]: Abstraction has 7432 states and 25361 transitions. [2021-06-05 06:23:58,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:58,351 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 25361 transitions. [2021-06-05 06:23:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:23:58,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:58,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:58,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:58,561 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1689012902, now seen corresponding path program 108 times [2021-06-05 06:23:58,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:58,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11826423] [2021-06-05 06:23:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:58,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:58,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11826423] [2021-06-05 06:23:58,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11826423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:58,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225271056] [2021-06-05 06:23:58,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:58,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:23:58,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:58,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:23:58,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:58,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:58,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:58,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:58,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 06:23:58,923 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:58,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:58,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:23:58,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:23:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:58,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225271056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:58,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:58,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:23:58,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985281372] [2021-06-05 06:23:58,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:23:58,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:58,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:23:58,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:23:58,995 INFO L87 Difference]: Start difference. First operand 7432 states and 25361 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:00,350 INFO L93 Difference]: Finished difference Result 9757 states and 32809 transitions. [2021-06-05 06:24:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:24:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:00,365 INFO L225 Difference]: With dead ends: 9757 [2021-06-05 06:24:00,365 INFO L226 Difference]: Without dead ends: 9713 [2021-06-05 06:24:00,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 989.2ms TimeCoverageRelationStatistics Valid=308, Invalid=1854, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:24:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9713 states. [2021-06-05 06:24:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9713 to 7399. [2021-06-05 06:24:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.4138956474722897) internal successors, (25256), 7398 states have internal predecessors, (25256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 25256 transitions. [2021-06-05 06:24:00,480 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 25256 transitions. Word has length 30 [2021-06-05 06:24:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:00,480 INFO L482 AbstractCegarLoop]: Abstraction has 7399 states and 25256 transitions. [2021-06-05 06:24:00,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 25256 transitions. [2021-06-05 06:24:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:00,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:00,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:00,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:00,690 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1746001132, now seen corresponding path program 109 times [2021-06-05 06:24:00,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:00,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850394647] [2021-06-05 06:24:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:00,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:00,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850394647] [2021-06-05 06:24:00,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850394647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:00,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744098659] [2021-06-05 06:24:00,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:00,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:24:00,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:01,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:01,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:01,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:24:01,085 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:01,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:01,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:01,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:24:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:01,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744098659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:01,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:01,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:24:01,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111619198] [2021-06-05 06:24:01,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:24:01,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:01,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:24:01,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:24:01,167 INFO L87 Difference]: Start difference. First operand 7399 states and 25256 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:02,012 INFO L93 Difference]: Finished difference Result 9549 states and 32090 transitions. [2021-06-05 06:24:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:24:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:02,031 INFO L225 Difference]: With dead ends: 9549 [2021-06-05 06:24:02,032 INFO L226 Difference]: Without dead ends: 9511 [2021-06-05 06:24:02,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:24:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9511 states. [2021-06-05 06:24:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9511 to 7411. [2021-06-05 06:24:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 3.414574898785425) internal successors, (25302), 7410 states have internal predecessors, (25302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 25302 transitions. [2021-06-05 06:24:02,149 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 25302 transitions. Word has length 30 [2021-06-05 06:24:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:02,149 INFO L482 AbstractCegarLoop]: Abstraction has 7411 states and 25302 transitions. [2021-06-05 06:24:02,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 25302 transitions. [2021-06-05 06:24:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:02,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:02,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:02,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:02,358 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:02,359 INFO L82 PathProgramCache]: Analyzing trace with hash 298416662, now seen corresponding path program 110 times [2021-06-05 06:24:02,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:02,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828916845] [2021-06-05 06:24:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:02,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:02,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828916845] [2021-06-05 06:24:02,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828916845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:02,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225310294] [2021-06-05 06:24:02,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:02,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:02,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:02,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:24:02,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:02,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:02,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:02,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:02,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:02,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:02,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-06-05 06:24:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:02,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225310294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:02,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:02,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:24:02,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876299229] [2021-06-05 06:24:02,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:24:02,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:24:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:24:02,874 INFO L87 Difference]: Start difference. First operand 7411 states and 25302 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:04,236 INFO L93 Difference]: Finished difference Result 9078 states and 30424 transitions. [2021-06-05 06:24:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:24:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:04,250 INFO L225 Difference]: With dead ends: 9078 [2021-06-05 06:24:04,250 INFO L226 Difference]: Without dead ends: 9045 [2021-06-05 06:24:04,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 927.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:24:04,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2021-06-05 06:24:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 7438. [2021-06-05 06:24:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 3.412800860562055) internal successors, (25381), 7437 states have internal predecessors, (25381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 25381 transitions. [2021-06-05 06:24:04,361 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 25381 transitions. Word has length 30 [2021-06-05 06:24:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:04,361 INFO L482 AbstractCegarLoop]: Abstraction has 7438 states and 25381 transitions. [2021-06-05 06:24:04,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 25381 transitions. [2021-06-05 06:24:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:04,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:04,371 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:04,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 06:24:04,571 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:04,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1937279850, now seen corresponding path program 111 times [2021-06-05 06:24:04,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:04,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146711652] [2021-06-05 06:24:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:04,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:04,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146711652] [2021-06-05 06:24:04,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146711652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:04,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822111932] [2021-06-05 06:24:04,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:04,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:24:04,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:04,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:24:04,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:05,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:05,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:05,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:05,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:05,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:05,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:24:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:05,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822111932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:05,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:05,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:24:05,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368041053] [2021-06-05 06:24:05,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:24:05,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:05,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:24:05,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:24:05,071 INFO L87 Difference]: Start difference. First operand 7438 states and 25381 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:06,771 INFO L93 Difference]: Finished difference Result 9393 states and 31341 transitions. [2021-06-05 06:24:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:24:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:06,786 INFO L225 Difference]: With dead ends: 9393 [2021-06-05 06:24:06,786 INFO L226 Difference]: Without dead ends: 9360 [2021-06-05 06:24:06,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1272.5ms TimeCoverageRelationStatistics Valid=311, Invalid=2041, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:24:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-06-05 06:24:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 7433. [2021-06-05 06:24:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 3.4122712594187297) internal successors, (25360), 7432 states have internal predecessors, (25360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 25360 transitions. [2021-06-05 06:24:06,900 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 25360 transitions. Word has length 30 [2021-06-05 06:24:06,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:06,900 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 25360 transitions. [2021-06-05 06:24:06,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:06,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 25360 transitions. [2021-06-05 06:24:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:06,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:06,909 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:07,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:07,110 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:07,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:07,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1168264038, now seen corresponding path program 112 times [2021-06-05 06:24:07,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:07,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090219328] [2021-06-05 06:24:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:07,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:07,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090219328] [2021-06-05 06:24:07,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090219328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:07,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418659684] [2021-06-05 06:24:07,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:07,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:24:07,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:24:07,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:07,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:07,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:07,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:07,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:07,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:07,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:07,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:24:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:07,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418659684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:07,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:07,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 06:24:07,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6344811] [2021-06-05 06:24:07,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:24:07,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:07,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:24:07,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:24:07,665 INFO L87 Difference]: Start difference. First operand 7433 states and 25360 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:08,125 INFO L93 Difference]: Finished difference Result 7974 states and 26897 transitions. [2021-06-05 06:24:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:24:08,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:08,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:08,137 INFO L225 Difference]: With dead ends: 7974 [2021-06-05 06:24:08,137 INFO L226 Difference]: Without dead ends: 7948 [2021-06-05 06:24:08,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:24:08,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-06-05 06:24:08,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7410. [2021-06-05 06:24:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4130112025914427) internal successors, (25287), 7409 states have internal predecessors, (25287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25287 transitions. [2021-06-05 06:24:08,239 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25287 transitions. Word has length 30 [2021-06-05 06:24:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:08,239 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25287 transitions. [2021-06-05 06:24:08,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25287 transitions. [2021-06-05 06:24:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:08,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:08,248 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:08,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:08,448 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1252420240, now seen corresponding path program 113 times [2021-06-05 06:24:08,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:08,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131893577] [2021-06-05 06:24:08,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:08,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:08,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131893577] [2021-06-05 06:24:08,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131893577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:08,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300634814] [2021-06-05 06:24:08,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:08,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:24:08,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:08,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:24:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:08,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:08,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:08,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:08,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:08,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:08,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:24:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:08,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300634814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:08,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:08,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 06:24:08,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888465209] [2021-06-05 06:24:08,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:24:08,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:24:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:24:08,919 INFO L87 Difference]: Start difference. First operand 7410 states and 25287 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:10,095 INFO L93 Difference]: Finished difference Result 9196 states and 30718 transitions. [2021-06-05 06:24:10,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:24:10,096 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:10,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:10,109 INFO L225 Difference]: With dead ends: 9196 [2021-06-05 06:24:10,109 INFO L226 Difference]: Without dead ends: 9170 [2021-06-05 06:24:10,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 992.1ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:24:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2021-06-05 06:24:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 7390. [2021-06-05 06:24:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 3.4141291108404386) internal successors, (25227), 7389 states have internal predecessors, (25227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 25227 transitions. [2021-06-05 06:24:10,219 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 25227 transitions. Word has length 30 [2021-06-05 06:24:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:10,219 INFO L482 AbstractCegarLoop]: Abstraction has 7390 states and 25227 transitions. [2021-06-05 06:24:10,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 25227 transitions. [2021-06-05 06:24:10,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:10,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:10,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:10,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-06-05 06:24:10,430 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:10,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:10,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1782395603, now seen corresponding path program 34 times [2021-06-05 06:24:10,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:10,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143866129] [2021-06-05 06:24:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:10,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143866129] [2021-06-05 06:24:10,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143866129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:10,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064403794] [2021-06-05 06:24:10,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:10,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:24:10,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:10,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:24:10,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:10,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:10,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:10,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:10,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:10,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 06:24:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:10,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064403794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:10,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:10,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:24:10,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949850522] [2021-06-05 06:24:10,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:24:10,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:10,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:24:10,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:24:10,706 INFO L87 Difference]: Start difference. First operand 7390 states and 25227 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:10,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:10,872 INFO L93 Difference]: Finished difference Result 8178 states and 27562 transitions. [2021-06-05 06:24:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:24:10,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:10,883 INFO L225 Difference]: With dead ends: 8178 [2021-06-05 06:24:10,884 INFO L226 Difference]: Without dead ends: 8092 [2021-06-05 06:24:10,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:24:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2021-06-05 06:24:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 7410. [2021-06-05 06:24:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4105817249291404) internal successors, (25269), 7409 states have internal predecessors, (25269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25269 transitions. [2021-06-05 06:24:10,984 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25269 transitions. Word has length 30 [2021-06-05 06:24:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:10,985 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25269 transitions. [2021-06-05 06:24:10,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25269 transitions. [2021-06-05 06:24:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:10,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:10,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:11,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:11,194 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:11,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1423069146, now seen corresponding path program 114 times [2021-06-05 06:24:11,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:11,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34640197] [2021-06-05 06:24:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:11,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:11,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34640197] [2021-06-05 06:24:11,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34640197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:11,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058427507] [2021-06-05 06:24:11,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:11,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:24:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:24:11,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:11,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:11,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:11,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:24:11,628 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:11,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:11,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:11,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:24:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:11,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058427507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:11,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:11,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:24:11,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219257841] [2021-06-05 06:24:11,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:24:11,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:11,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:24:11,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:24:11,679 INFO L87 Difference]: Start difference. First operand 7410 states and 25269 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:13,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:13,855 INFO L93 Difference]: Finished difference Result 11711 states and 38605 transitions. [2021-06-05 06:24:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:24:13,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:13,873 INFO L225 Difference]: With dead ends: 11711 [2021-06-05 06:24:13,873 INFO L226 Difference]: Without dead ends: 11656 [2021-06-05 06:24:13,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1701.3ms TimeCoverageRelationStatistics Valid=582, Invalid=4530, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:24:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11656 states. [2021-06-05 06:24:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11656 to 7487. [2021-06-05 06:24:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7487 states, 7486 states have (on average 3.41170184344109) internal successors, (25540), 7486 states have internal predecessors, (25540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7487 states to 7487 states and 25540 transitions. [2021-06-05 06:24:14,060 INFO L78 Accepts]: Start accepts. Automaton has 7487 states and 25540 transitions. Word has length 30 [2021-06-05 06:24:14,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:14,060 INFO L482 AbstractCegarLoop]: Abstraction has 7487 states and 25540 transitions. [2021-06-05 06:24:14,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:14,060 INFO L276 IsEmpty]: Start isEmpty. Operand 7487 states and 25540 transitions. [2021-06-05 06:24:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:14,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:14,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:14,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:14,270 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1640634574, now seen corresponding path program 115 times [2021-06-05 06:24:14,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:14,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251220752] [2021-06-05 06:24:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:14,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:14,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251220752] [2021-06-05 06:24:14,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251220752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:14,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636445585] [2021-06-05 06:24:14,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:24:14,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:14,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:14,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:14,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:24:14,689 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:14,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:14,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:14,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:24:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:14,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636445585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:14,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:14,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:24:14,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164136090] [2021-06-05 06:24:14,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:24:14,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:14,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:24:14,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:24:14,740 INFO L87 Difference]: Start difference. First operand 7487 states and 25540 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:16,379 INFO L93 Difference]: Finished difference Result 10792 states and 35822 transitions. [2021-06-05 06:24:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:24:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:16,397 INFO L225 Difference]: With dead ends: 10792 [2021-06-05 06:24:16,397 INFO L226 Difference]: Without dead ends: 10735 [2021-06-05 06:24:16,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1341.4ms TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:24:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2021-06-05 06:24:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 7475. [2021-06-05 06:24:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 7474 states have (on average 3.409017928819909) internal successors, (25479), 7474 states have internal predecessors, (25479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 25479 transitions. [2021-06-05 06:24:16,527 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 25479 transitions. Word has length 30 [2021-06-05 06:24:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:16,527 INFO L482 AbstractCegarLoop]: Abstraction has 7475 states and 25479 transitions. [2021-06-05 06:24:16,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 25479 transitions. [2021-06-05 06:24:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:16,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:16,536 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:16,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:16,737 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1876404162, now seen corresponding path program 116 times [2021-06-05 06:24:16,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:16,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563992524] [2021-06-05 06:24:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:16,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:16,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563992524] [2021-06-05 06:24:16,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563992524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:16,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253263330] [2021-06-05 06:24:16,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:16,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:16,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:16,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:24:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:17,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:17,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:24:17,156 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:17,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:17,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:24:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:17,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253263330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:17,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:17,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:24:17,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922402532] [2021-06-05 06:24:17,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:24:17,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:17,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:24:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:24:17,241 INFO L87 Difference]: Start difference. First operand 7475 states and 25479 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:18,255 INFO L93 Difference]: Finished difference Result 9562 states and 32103 transitions. [2021-06-05 06:24:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:24:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:18,269 INFO L225 Difference]: With dead ends: 9562 [2021-06-05 06:24:18,270 INFO L226 Difference]: Without dead ends: 9491 [2021-06-05 06:24:18,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 772.9ms TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:24:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-06-05 06:24:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7458. [2021-06-05 06:24:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.408072951589111) internal successors, (25414), 7457 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 25414 transitions. [2021-06-05 06:24:18,389 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 25414 transitions. Word has length 30 [2021-06-05 06:24:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:18,389 INFO L482 AbstractCegarLoop]: Abstraction has 7458 states and 25414 transitions. [2021-06-05 06:24:18,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 25414 transitions. [2021-06-05 06:24:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:18,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:18,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:18,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-05 06:24:18,599 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash 54174113, now seen corresponding path program 35 times [2021-06-05 06:24:18,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:18,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046618050] [2021-06-05 06:24:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:18,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:18,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046618050] [2021-06-05 06:24:18,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046618050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:18,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086164006] [2021-06-05 06:24:18,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:18,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:24:18,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:18,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:24:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:18,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:18,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:18,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:18,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:18,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 06:24:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:18,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086164006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:18,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:18,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:24:18,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312154713] [2021-06-05 06:24:18,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:24:18,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:18,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:24:18,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:24:18,864 INFO L87 Difference]: Start difference. First operand 7458 states and 25414 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:19,051 INFO L93 Difference]: Finished difference Result 7805 states and 26445 transitions. [2021-06-05 06:24:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:24:19,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:19,063 INFO L225 Difference]: With dead ends: 7805 [2021-06-05 06:24:19,063 INFO L226 Difference]: Without dead ends: 7774 [2021-06-05 06:24:19,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:24:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-06-05 06:24:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 7430. [2021-06-05 06:24:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.4109570601696055) internal successors, (25340), 7429 states have internal predecessors, (25340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 25340 transitions. [2021-06-05 06:24:19,164 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 25340 transitions. Word has length 30 [2021-06-05 06:24:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:19,164 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 25340 transitions. [2021-06-05 06:24:19,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 25340 transitions. [2021-06-05 06:24:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:19,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:19,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:19,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:19,373 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2093501780, now seen corresponding path program 117 times [2021-06-05 06:24:19,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:19,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869815576] [2021-06-05 06:24:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:19,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:19,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869815576] [2021-06-05 06:24:19,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869815576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:19,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243876790] [2021-06-05 06:24:19,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:19,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:24:19,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:19,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:24:19,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:19,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:19,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:19,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:19,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:19,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:19,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:19,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:24:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:19,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243876790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:19,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:19,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 06:24:19,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420121655] [2021-06-05 06:24:19,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:24:19,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:19,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:24:19,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:24:19,864 INFO L87 Difference]: Start difference. First operand 7430 states and 25340 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:20,855 INFO L93 Difference]: Finished difference Result 9193 states and 30704 transitions. [2021-06-05 06:24:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:24:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:20,869 INFO L225 Difference]: With dead ends: 9193 [2021-06-05 06:24:20,869 INFO L226 Difference]: Without dead ends: 9160 [2021-06-05 06:24:20,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 870.5ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:24:20,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2021-06-05 06:24:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 7443. [2021-06-05 06:24:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 7442 states have (on average 3.4106423004568662) internal successors, (25382), 7442 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 25382 transitions. [2021-06-05 06:24:21,012 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 25382 transitions. Word has length 30 [2021-06-05 06:24:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:21,012 INFO L482 AbstractCegarLoop]: Abstraction has 7443 states and 25382 transitions. [2021-06-05 06:24:21,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 25382 transitions. [2021-06-05 06:24:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:21,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:21,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:21,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:21,222 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:21,222 INFO L82 PathProgramCache]: Analyzing trace with hash 769171052, now seen corresponding path program 118 times [2021-06-05 06:24:21,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:21,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926450537] [2021-06-05 06:24:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:21,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:21,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926450537] [2021-06-05 06:24:21,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926450537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:21,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377184449] [2021-06-05 06:24:21,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:21,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:24:21,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:21,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:24:21,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:21,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:21,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:21,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:21,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:21,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:21,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:21,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:24:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:21,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377184449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:21,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:21,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:24:21,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871269498] [2021-06-05 06:24:21,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:24:21,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:21,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:24:21,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:24:21,716 INFO L87 Difference]: Start difference. First operand 7443 states and 25382 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:23,240 INFO L93 Difference]: Finished difference Result 9705 states and 32422 transitions. [2021-06-05 06:24:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:24:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:23,256 INFO L225 Difference]: With dead ends: 9705 [2021-06-05 06:24:23,256 INFO L226 Difference]: Without dead ends: 9672 [2021-06-05 06:24:23,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1321.7ms TimeCoverageRelationStatistics Valid=470, Invalid=2392, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:24:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9672 states. [2021-06-05 06:24:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9672 to 7455. [2021-06-05 06:24:23,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4097129058223774) internal successors, (25416), 7454 states have internal predecessors, (25416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25416 transitions. [2021-06-05 06:24:23,385 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25416 transitions. Word has length 30 [2021-06-05 06:24:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:23,386 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25416 transitions. [2021-06-05 06:24:23,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25416 transitions. [2021-06-05 06:24:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:23,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:23,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:23,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-06-05 06:24:23,597 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2080023144, now seen corresponding path program 119 times [2021-06-05 06:24:23,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:23,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443951985] [2021-06-05 06:24:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:23,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:23,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443951985] [2021-06-05 06:24:23,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443951985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:23,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718380868] [2021-06-05 06:24:23,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:23,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:24:23,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:23,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:24:23,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:24,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:24,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:24:24,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:24,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:24,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:24,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:35 [2021-06-05 06:24:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:24,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718380868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:24,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:24,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 06:24:24,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291706019] [2021-06-05 06:24:24,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:24:24,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:24:24,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:24:24,164 INFO L87 Difference]: Start difference. First operand 7455 states and 25416 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:26,351 INFO L93 Difference]: Finished difference Result 10824 states and 35717 transitions. [2021-06-05 06:24:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:24:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:26,369 INFO L225 Difference]: With dead ends: 10824 [2021-06-05 06:24:26,369 INFO L226 Difference]: Without dead ends: 10757 [2021-06-05 06:24:26,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1629.7ms TimeCoverageRelationStatistics Valid=469, Invalid=3191, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:24:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10757 states. [2021-06-05 06:24:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10757 to 7452. [2021-06-05 06:24:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7452 states, 7451 states have (on average 3.410146289088713) internal successors, (25409), 7451 states have internal predecessors, (25409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7452 states to 7452 states and 25409 transitions. [2021-06-05 06:24:26,506 INFO L78 Accepts]: Start accepts. Automaton has 7452 states and 25409 transitions. Word has length 30 [2021-06-05 06:24:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:26,506 INFO L482 AbstractCegarLoop]: Abstraction has 7452 states and 25409 transitions. [2021-06-05 06:24:26,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 7452 states and 25409 transitions. [2021-06-05 06:24:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:26,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:26,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:26,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:26,716 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:26,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash 169988712, now seen corresponding path program 120 times [2021-06-05 06:24:26,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:26,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180817255] [2021-06-05 06:24:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:26,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:26,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180817255] [2021-06-05 06:24:26,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180817255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:26,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569313731] [2021-06-05 06:24:26,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:26,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:24:26,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:24:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:27,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:27,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:24:27,183 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:27,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:27,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:27,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:24:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:27,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569313731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:27,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:27,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:24:27,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825164812] [2021-06-05 06:24:27,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:24:27,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:27,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:24:27,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:24:27,237 INFO L87 Difference]: Start difference. First operand 7452 states and 25409 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:30,706 INFO L93 Difference]: Finished difference Result 11741 states and 38704 transitions. [2021-06-05 06:24:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 06:24:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:30,725 INFO L225 Difference]: With dead ends: 11741 [2021-06-05 06:24:30,725 INFO L226 Difference]: Without dead ends: 11682 [2021-06-05 06:24:30,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 2743.6ms TimeCoverageRelationStatistics Valid=1148, Invalid=6508, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:24:30,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2021-06-05 06:24:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 7513. [2021-06-05 06:24:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7513 states, 7512 states have (on average 3.413738019169329) internal successors, (25644), 7512 states have internal predecessors, (25644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7513 states to 7513 states and 25644 transitions. [2021-06-05 06:24:30,859 INFO L78 Accepts]: Start accepts. Automaton has 7513 states and 25644 transitions. Word has length 30 [2021-06-05 06:24:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:30,859 INFO L482 AbstractCegarLoop]: Abstraction has 7513 states and 25644 transitions. [2021-06-05 06:24:30,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7513 states and 25644 transitions. [2021-06-05 06:24:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:30,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:30,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:31,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 06:24:31,069 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:31,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1544008528, now seen corresponding path program 121 times [2021-06-05 06:24:31,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:31,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885260246] [2021-06-05 06:24:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:31,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:31,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885260246] [2021-06-05 06:24:31,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885260246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:31,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829885702] [2021-06-05 06:24:31,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:24:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:31,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:31,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:31,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:31,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:24:31,462 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:31,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:31,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:31,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:24:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:31,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829885702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:31,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:31,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:24:31,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11039489] [2021-06-05 06:24:31,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:24:31,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:24:31,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:24:31,534 INFO L87 Difference]: Start difference. First operand 7513 states and 25644 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:32,736 INFO L93 Difference]: Finished difference Result 11967 states and 39772 transitions. [2021-06-05 06:24:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:24:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:32,755 INFO L225 Difference]: With dead ends: 11967 [2021-06-05 06:24:32,755 INFO L226 Difference]: Without dead ends: 11882 [2021-06-05 06:24:32,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1032.0ms TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:24:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11882 states. [2021-06-05 06:24:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11882 to 7506. [2021-06-05 06:24:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7506 states, 7505 states have (on average 3.4131912058627583) internal successors, (25616), 7505 states have internal predecessors, (25616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7506 states to 7506 states and 25616 transitions. [2021-06-05 06:24:32,882 INFO L78 Accepts]: Start accepts. Automaton has 7506 states and 25616 transitions. Word has length 30 [2021-06-05 06:24:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:32,882 INFO L482 AbstractCegarLoop]: Abstraction has 7506 states and 25616 transitions. [2021-06-05 06:24:32,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 7506 states and 25616 transitions. [2021-06-05 06:24:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:32,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:32,891 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:33,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:33,092 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:33,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1726792916, now seen corresponding path program 122 times [2021-06-05 06:24:33,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:33,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700318380] [2021-06-05 06:24:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:33,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:33,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700318380] [2021-06-05 06:24:33,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700318380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:33,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072635265] [2021-06-05 06:24:33,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:33,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:33,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:24:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:33,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:33,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:33,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:24:33,483 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:33,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:33,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:33,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-06-05 06:24:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:33,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072635265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:33,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:33,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:24:33,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980274431] [2021-06-05 06:24:33,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:24:33,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:33,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:24:33,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:24:33,554 INFO L87 Difference]: Start difference. First operand 7506 states and 25616 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:35,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:35,934 INFO L93 Difference]: Finished difference Result 12586 states and 41642 transitions. [2021-06-05 06:24:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:24:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:35,955 INFO L225 Difference]: With dead ends: 12586 [2021-06-05 06:24:35,955 INFO L226 Difference]: Without dead ends: 12498 [2021-06-05 06:24:35,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1873.0ms TimeCoverageRelationStatistics Valid=829, Invalid=4001, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:24:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12498 states. [2021-06-05 06:24:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12498 to 7581. [2021-06-05 06:24:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7581 states, 7580 states have (on average 3.4108179419525064) internal successors, (25854), 7580 states have internal predecessors, (25854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7581 states to 7581 states and 25854 transitions. [2021-06-05 06:24:36,129 INFO L78 Accepts]: Start accepts. Automaton has 7581 states and 25854 transitions. Word has length 30 [2021-06-05 06:24:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:36,129 INFO L482 AbstractCegarLoop]: Abstraction has 7581 states and 25854 transitions. [2021-06-05 06:24:36,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 7581 states and 25854 transitions. [2021-06-05 06:24:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:36,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:36,138 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:36,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:36,338 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:36,339 INFO L82 PathProgramCache]: Analyzing trace with hash -197397320, now seen corresponding path program 123 times [2021-06-05 06:24:36,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:36,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143208639] [2021-06-05 06:24:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:36,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:36,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143208639] [2021-06-05 06:24:36,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143208639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:36,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021378812] [2021-06-05 06:24:36,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:36,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:24:36,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:24:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:36,848 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:24:36,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 48 [2021-06-05 06:24:36,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:36,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:36,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:36,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:3 [2021-06-05 06:24:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:36,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021378812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:36,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:36,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:24:36,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111483210] [2021-06-05 06:24:36,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:24:36,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:36,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:24:36,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:24:36,878 INFO L87 Difference]: Start difference. First operand 7581 states and 25854 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:42,941 INFO L93 Difference]: Finished difference Result 10935 states and 36351 transitions. [2021-06-05 06:24:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:24:42,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:42,961 INFO L225 Difference]: With dead ends: 10935 [2021-06-05 06:24:42,961 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 06:24:42,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 4408.6ms TimeCoverageRelationStatistics Valid=713, Invalid=3978, Unknown=1, NotChecked=0, Total=4692 [2021-06-05 06:24:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 06:24:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 7589. [2021-06-05 06:24:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 3.411834475487612) internal successors, (25889), 7588 states have internal predecessors, (25889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 25889 transitions. [2021-06-05 06:24:43,131 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 25889 transitions. Word has length 30 [2021-06-05 06:24:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:43,131 INFO L482 AbstractCegarLoop]: Abstraction has 7589 states and 25889 transitions. [2021-06-05 06:24:43,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 25889 transitions. [2021-06-05 06:24:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:43,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:43,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:43,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 06:24:43,341 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:43,342 INFO L82 PathProgramCache]: Analyzing trace with hash 262838404, now seen corresponding path program 124 times [2021-06-05 06:24:43,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:43,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509367452] [2021-06-05 06:24:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:43,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509367452] [2021-06-05 06:24:43,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509367452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126458918] [2021-06-05 06:24:43,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:43,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:24:43,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:43,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:24:43,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:43,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:43,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:43,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:43,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 06:24:43,796 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:43,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:43,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:43,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:24:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:43,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126458918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:43,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:43,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:24:43,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072476209] [2021-06-05 06:24:43,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:24:43,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:43,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:24:43,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:24:43,882 INFO L87 Difference]: Start difference. First operand 7589 states and 25889 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:44,409 INFO L93 Difference]: Finished difference Result 9231 states and 31088 transitions. [2021-06-05 06:24:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:24:44,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:44,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:44,424 INFO L225 Difference]: With dead ends: 9231 [2021-06-05 06:24:44,425 INFO L226 Difference]: Without dead ends: 9196 [2021-06-05 06:24:44,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:24:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-06-05 06:24:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 7585. [2021-06-05 06:24:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.411260548523207) internal successors, (25871), 7584 states have internal predecessors, (25871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 25871 transitions. [2021-06-05 06:24:44,548 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 25871 transitions. Word has length 30 [2021-06-05 06:24:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:44,548 INFO L482 AbstractCegarLoop]: Abstraction has 7585 states and 25871 transitions. [2021-06-05 06:24:44,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 25871 transitions. [2021-06-05 06:24:44,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:44,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:44,559 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:44,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:44,759 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:44,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1222250922, now seen corresponding path program 125 times [2021-06-05 06:24:44,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:44,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307681184] [2021-06-05 06:24:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:45,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:45,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307681184] [2021-06-05 06:24:45,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307681184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:45,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191175528] [2021-06-05 06:24:45,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:45,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:24:45,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:45,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:24:45,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:45,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:45,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:45,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:24:45,249 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:45,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:45,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:45,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:24:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:45,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191175528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:45,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:45,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:24:45,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689645514] [2021-06-05 06:24:45,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:24:45,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:45,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:24:45,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:24:45,306 INFO L87 Difference]: Start difference. First operand 7585 states and 25871 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:46,295 INFO L93 Difference]: Finished difference Result 9670 states and 32321 transitions. [2021-06-05 06:24:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:24:46,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:46,310 INFO L225 Difference]: With dead ends: 9670 [2021-06-05 06:24:46,310 INFO L226 Difference]: Without dead ends: 9635 [2021-06-05 06:24:46,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 706.0ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:24:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9635 states. [2021-06-05 06:24:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9635 to 7577. [2021-06-05 06:24:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.4107708553326295) internal successors, (25840), 7576 states have internal predecessors, (25840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 25840 transitions. [2021-06-05 06:24:46,437 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 25840 transitions. Word has length 30 [2021-06-05 06:24:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:46,438 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 25840 transitions. [2021-06-05 06:24:46,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 25840 transitions. [2021-06-05 06:24:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:46,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:46,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:46,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-06-05 06:24:46,648 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:46,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1382773470, now seen corresponding path program 126 times [2021-06-05 06:24:46,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:46,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706748950] [2021-06-05 06:24:46,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:46,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:46,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706748950] [2021-06-05 06:24:46,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706748950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:46,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216176599] [2021-06-05 06:24:46,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:46,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:24:46,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:46,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:24:46,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:47,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:47,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:47,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:47,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:24:47,207 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:47,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:47,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:47,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:24:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:47,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216176599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:47,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:47,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:24:47,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731807546] [2021-06-05 06:24:47,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:24:47,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:47,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:24:47,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:24:47,301 INFO L87 Difference]: Start difference. First operand 7577 states and 25840 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:48,963 INFO L93 Difference]: Finished difference Result 9586 states and 32012 transitions. [2021-06-05 06:24:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:24:48,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:48,979 INFO L225 Difference]: With dead ends: 9586 [2021-06-05 06:24:48,979 INFO L226 Difference]: Without dead ends: 9518 [2021-06-05 06:24:48,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1292.4ms TimeCoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:24:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-06-05 06:24:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7570. [2021-06-05 06:24:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 3.4089047430307833) internal successors, (25802), 7569 states have internal predecessors, (25802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 25802 transitions. [2021-06-05 06:24:49,108 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 25802 transitions. Word has length 30 [2021-06-05 06:24:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:49,108 INFO L482 AbstractCegarLoop]: Abstraction has 7570 states and 25802 transitions. [2021-06-05 06:24:49,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 25802 transitions. [2021-06-05 06:24:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:49,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:49,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:49,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:49,318 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:49,318 INFO L82 PathProgramCache]: Analyzing trace with hash -692066666, now seen corresponding path program 127 times [2021-06-05 06:24:49,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:49,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442906415] [2021-06-05 06:24:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:49,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:49,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442906415] [2021-06-05 06:24:49,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442906415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:49,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509681338] [2021-06-05 06:24:49,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:49,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:24:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:49,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:49,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:49,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:49,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:49,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:24:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:49,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509681338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:49,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:49,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:24:49,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122875550] [2021-06-05 06:24:49,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:24:49,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:24:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:24:49,873 INFO L87 Difference]: Start difference. First operand 7570 states and 25802 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:52,152 INFO L93 Difference]: Finished difference Result 11143 states and 37083 transitions. [2021-06-05 06:24:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:24:52,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:52,169 INFO L225 Difference]: With dead ends: 11143 [2021-06-05 06:24:52,170 INFO L226 Difference]: Without dead ends: 11122 [2021-06-05 06:24:52,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1586.1ms TimeCoverageRelationStatistics Valid=478, Invalid=2492, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:24:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-06-05 06:24:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 7564. [2021-06-05 06:24:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7564 states, 7563 states have (on average 3.4084358058971307) internal successors, (25778), 7563 states have internal predecessors, (25778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7564 states to 7564 states and 25778 transitions. [2021-06-05 06:24:52,299 INFO L78 Accepts]: Start accepts. Automaton has 7564 states and 25778 transitions. Word has length 30 [2021-06-05 06:24:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:52,299 INFO L482 AbstractCegarLoop]: Abstraction has 7564 states and 25778 transitions. [2021-06-05 06:24:52,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 7564 states and 25778 transitions. [2021-06-05 06:24:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:52,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:52,309 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:52,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:52,510 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:52,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:52,510 INFO L82 PathProgramCache]: Analyzing trace with hash -66350155, now seen corresponding path program 36 times [2021-06-05 06:24:52,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:52,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030797834] [2021-06-05 06:24:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:52,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:52,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030797834] [2021-06-05 06:24:52,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030797834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:52,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185719660] [2021-06-05 06:24:52,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:52,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:24:52,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:52,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:24:52,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:52,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:52,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:52,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:52,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:52,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 06:24:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:52,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185719660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:52,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:52,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:24:52,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530381674] [2021-06-05 06:24:52,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:24:52,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:24:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:24:52,833 INFO L87 Difference]: Start difference. First operand 7564 states and 25778 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:53,047 INFO L93 Difference]: Finished difference Result 7890 states and 26740 transitions. [2021-06-05 06:24:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:24:53,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:53,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:53,061 INFO L225 Difference]: With dead ends: 7890 [2021-06-05 06:24:53,061 INFO L226 Difference]: Without dead ends: 7861 [2021-06-05 06:24:53,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:24:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7861 states. [2021-06-05 06:24:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7861 to 7612. [2021-06-05 06:24:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7612 states, 7611 states have (on average 3.408487715149126) internal successors, (25942), 7611 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7612 states to 7612 states and 25942 transitions. [2021-06-05 06:24:53,173 INFO L78 Accepts]: Start accepts. Automaton has 7612 states and 25942 transitions. Word has length 30 [2021-06-05 06:24:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:53,173 INFO L482 AbstractCegarLoop]: Abstraction has 7612 states and 25942 transitions. [2021-06-05 06:24:53,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 7612 states and 25942 transitions. [2021-06-05 06:24:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:53,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:53,183 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:53,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 06:24:53,384 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:53,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1138574553, now seen corresponding path program 37 times [2021-06-05 06:24:53,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:53,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654193647] [2021-06-05 06:24:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:53,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:53,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654193647] [2021-06-05 06:24:53,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654193647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:53,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253801242] [2021-06-05 06:24:53,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:53,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:24:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:53,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:53,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:53,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:53,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:53,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 06:24:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:53,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253801242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:53,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:53,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:24:53,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278738316] [2021-06-05 06:24:53,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:24:53,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:53,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:24:53,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:24:53,692 INFO L87 Difference]: Start difference. First operand 7612 states and 25942 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:53,970 INFO L93 Difference]: Finished difference Result 7964 states and 26982 transitions. [2021-06-05 06:24:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:24:53,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:53,985 INFO L225 Difference]: With dead ends: 7964 [2021-06-05 06:24:53,985 INFO L226 Difference]: Without dead ends: 7927 [2021-06-05 06:24:53,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:24:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-05 06:24:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7628. [2021-06-05 06:24:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7628 states, 7627 states have (on average 3.4081552379703686) internal successors, (25994), 7627 states have internal predecessors, (25994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:54,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7628 states to 7628 states and 25994 transitions. [2021-06-05 06:24:54,105 INFO L78 Accepts]: Start accepts. Automaton has 7628 states and 25994 transitions. Word has length 30 [2021-06-05 06:24:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:54,105 INFO L482 AbstractCegarLoop]: Abstraction has 7628 states and 25994 transitions. [2021-06-05 06:24:54,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 7628 states and 25994 transitions. [2021-06-05 06:24:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:54,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:54,115 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:54,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 06:24:54,315 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash -427658407, now seen corresponding path program 38 times [2021-06-05 06:24:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:54,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264469236] [2021-06-05 06:24:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:54,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:54,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264469236] [2021-06-05 06:24:54,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264469236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:54,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285015931] [2021-06-05 06:24:54,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:54,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:24:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:54,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:54,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:54,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:54,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:54,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 06:24:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:54,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285015931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:54,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:54,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:24:54,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272901580] [2021-06-05 06:24:54,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:24:54,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:54,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:24:54,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:24:54,606 INFO L87 Difference]: Start difference. First operand 7628 states and 25994 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:54,910 INFO L93 Difference]: Finished difference Result 8177 states and 27650 transitions. [2021-06-05 06:24:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:24:54,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:54,923 INFO L225 Difference]: With dead ends: 8177 [2021-06-05 06:24:54,924 INFO L226 Difference]: Without dead ends: 8140 [2021-06-05 06:24:54,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:24:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8140 states. [2021-06-05 06:24:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8140 to 7656. [2021-06-05 06:24:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7656 states, 7655 states have (on average 3.4082299150881776) internal successors, (26090), 7655 states have internal predecessors, (26090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7656 states to 7656 states and 26090 transitions. [2021-06-05 06:24:55,078 INFO L78 Accepts]: Start accepts. Automaton has 7656 states and 26090 transitions. Word has length 30 [2021-06-05 06:24:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:55,078 INFO L482 AbstractCegarLoop]: Abstraction has 7656 states and 26090 transitions. [2021-06-05 06:24:55,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 7656 states and 26090 transitions. [2021-06-05 06:24:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:55,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:55,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:55,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 06:24:55,289 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash 53555180, now seen corresponding path program 128 times [2021-06-05 06:24:55,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:55,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667121318] [2021-06-05 06:24:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:55,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:55,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667121318] [2021-06-05 06:24:55,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667121318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:55,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141346478] [2021-06-05 06:24:55,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:55,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:55,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:55,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:24:55,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:55,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:55,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:55,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:24:55,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:55,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:55,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:55,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:24:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:55,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141346478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:55,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:55,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:24:55,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221122022] [2021-06-05 06:24:55,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:24:55,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:55,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:24:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:24:55,835 INFO L87 Difference]: Start difference. First operand 7656 states and 26090 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:57,208 INFO L93 Difference]: Finished difference Result 9529 states and 31968 transitions. [2021-06-05 06:24:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:24:57,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:24:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:57,223 INFO L225 Difference]: With dead ends: 9529 [2021-06-05 06:24:57,223 INFO L226 Difference]: Without dead ends: 9497 [2021-06-05 06:24:57,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1070.7ms TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:24:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-05 06:24:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 7679. [2021-06-05 06:24:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7679 states, 7678 states have (on average 3.40739775983329) internal successors, (26162), 7678 states have internal predecessors, (26162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7679 states to 7679 states and 26162 transitions. [2021-06-05 06:24:57,340 INFO L78 Accepts]: Start accepts. Automaton has 7679 states and 26162 transitions. Word has length 30 [2021-06-05 06:24:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:57,340 INFO L482 AbstractCegarLoop]: Abstraction has 7679 states and 26162 transitions. [2021-06-05 06:24:57,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7679 states and 26162 transitions. [2021-06-05 06:24:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:24:57,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:57,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:57,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 06:24:57,551 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:57,551 INFO L82 PathProgramCache]: Analyzing trace with hash -920787924, now seen corresponding path program 129 times [2021-06-05 06:24:57,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:57,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499651014] [2021-06-05 06:24:57,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:57,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:57,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499651014] [2021-06-05 06:24:57,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499651014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:57,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275839420] [2021-06-05 06:24:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:57,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:24:57,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:57,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:24:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:58,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:58,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 06:24:58,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:58,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:58,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:24:58,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:156 [2021-06-05 06:24:58,309 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 06:24:58,607 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 06:24:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:58,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275839420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:58,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:58,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:24:58,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681193446] [2021-06-05 06:24:58,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:24:58,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:58,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:24:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:24:58,763 INFO L87 Difference]: Start difference. First operand 7679 states and 26162 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:59,662 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 06:25:00,454 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-06-05 06:25:00,836 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-06-05 06:25:01,852 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-06-05 06:25:02,124 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 06:25:02,303 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 06:25:02,560 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 06:25:02,792 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2021-06-05 06:25:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:03,048 INFO L93 Difference]: Finished difference Result 10868 states and 36318 transitions. [2021-06-05 06:25:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:25:03,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:03,067 INFO L225 Difference]: With dead ends: 10868 [2021-06-05 06:25:03,067 INFO L226 Difference]: Without dead ends: 10793 [2021-06-05 06:25:03,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 4094.2ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:25:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10793 states. [2021-06-05 06:25:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10793 to 7682. [2021-06-05 06:25:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7682 states, 7681 states have (on average 3.406587683895326) internal successors, (26166), 7681 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7682 states to 7682 states and 26166 transitions. [2021-06-05 06:25:03,207 INFO L78 Accepts]: Start accepts. Automaton has 7682 states and 26166 transitions. Word has length 30 [2021-06-05 06:25:03,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:03,207 INFO L482 AbstractCegarLoop]: Abstraction has 7682 states and 26166 transitions. [2021-06-05 06:25:03,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 7682 states and 26166 transitions. [2021-06-05 06:25:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:03,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:03,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:03,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:03,418 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash 306904492, now seen corresponding path program 130 times [2021-06-05 06:25:03,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:03,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391749329] [2021-06-05 06:25:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:03,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:03,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391749329] [2021-06-05 06:25:03,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391749329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:03,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074536717] [2021-06-05 06:25:03,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:03,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:03,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:25:03,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:04,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:04,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:04,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:25:04,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:04,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:04,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:04,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:25:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:04,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074536717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:04,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:04,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 06:25:04,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622577842] [2021-06-05 06:25:04,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:25:04,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:04,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:25:04,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:25:04,122 INFO L87 Difference]: Start difference. First operand 7682 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:05,406 INFO L93 Difference]: Finished difference Result 10040 states and 33750 transitions. [2021-06-05 06:25:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:25:05,406 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:05,423 INFO L225 Difference]: With dead ends: 10040 [2021-06-05 06:25:05,423 INFO L226 Difference]: Without dead ends: 9989 [2021-06-05 06:25:05,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 942.2ms TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:25:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2021-06-05 06:25:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 7724. [2021-06-05 06:25:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7724 states, 7723 states have (on average 3.4080020717337822) internal successors, (26320), 7723 states have internal predecessors, (26320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 26320 transitions. [2021-06-05 06:25:05,553 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 26320 transitions. Word has length 30 [2021-06-05 06:25:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:05,554 INFO L482 AbstractCegarLoop]: Abstraction has 7724 states and 26320 transitions. [2021-06-05 06:25:05,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 26320 transitions. [2021-06-05 06:25:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:05,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:05,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:05,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 06:25:05,764 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash 861731688, now seen corresponding path program 131 times [2021-06-05 06:25:05,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:05,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095967880] [2021-06-05 06:25:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:06,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095967880] [2021-06-05 06:25:06,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095967880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217147126] [2021-06-05 06:25:06,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:06,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:25:06,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:25:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:06,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:06,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:25:06,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:06,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:06,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:06,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:25:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:06,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217147126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:06,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:06,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:25:06,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321878152] [2021-06-05 06:25:06,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:25:06,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:06,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:25:06,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:25:06,330 INFO L87 Difference]: Start difference. First operand 7724 states and 26320 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:08,438 INFO L93 Difference]: Finished difference Result 10471 states and 35019 transitions. [2021-06-05 06:25:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:25:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:08,456 INFO L225 Difference]: With dead ends: 10471 [2021-06-05 06:25:08,457 INFO L226 Difference]: Without dead ends: 10435 [2021-06-05 06:25:08,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1674.5ms TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:25:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-06-05 06:25:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 7741. [2021-06-05 06:25:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 7740 states have (on average 3.4059431524547805) internal successors, (26362), 7740 states have internal predecessors, (26362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 26362 transitions. [2021-06-05 06:25:08,640 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 26362 transitions. Word has length 30 [2021-06-05 06:25:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:08,640 INFO L482 AbstractCegarLoop]: Abstraction has 7741 states and 26362 transitions. [2021-06-05 06:25:08,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 26362 transitions. [2021-06-05 06:25:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:08,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:08,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:08,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:08,851 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash -806581072, now seen corresponding path program 132 times [2021-06-05 06:25:08,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:08,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298170644] [2021-06-05 06:25:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:09,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:09,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298170644] [2021-06-05 06:25:09,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298170644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:09,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088105230] [2021-06-05 06:25:09,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:09,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:25:09,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:09,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:25:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:09,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:09,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:09,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:25:09,341 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:09,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:09,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:09,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:25:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:09,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088105230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:09,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:09,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 06:25:09,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657856805] [2021-06-05 06:25:09,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:25:09,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:09,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:25:09,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:25:09,409 INFO L87 Difference]: Start difference. First operand 7741 states and 26362 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:10,754 INFO L93 Difference]: Finished difference Result 10347 states and 34526 transitions. [2021-06-05 06:25:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:25:10,754 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:10,772 INFO L225 Difference]: With dead ends: 10347 [2021-06-05 06:25:10,772 INFO L226 Difference]: Without dead ends: 10275 [2021-06-05 06:25:10,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 986.8ms TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:25:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2021-06-05 06:25:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 7692. [2021-06-05 06:25:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4054089195163177) internal successors, (26191), 7691 states have internal predecessors, (26191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26191 transitions. [2021-06-05 06:25:10,901 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26191 transitions. Word has length 30 [2021-06-05 06:25:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:10,901 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26191 transitions. [2021-06-05 06:25:10,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26191 transitions. [2021-06-05 06:25:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:10,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:10,911 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:11,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 06:25:11,111 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:11,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:11,112 INFO L82 PathProgramCache]: Analyzing trace with hash -697524088, now seen corresponding path program 133 times [2021-06-05 06:25:11,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:11,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720179896] [2021-06-05 06:25:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:11,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:11,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720179896] [2021-06-05 06:25:11,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720179896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:11,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092534759] [2021-06-05 06:25:11,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:11,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:25:11,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:11,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:11,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:11,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:25:11,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:11,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:11,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:11,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:25:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:11,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092534759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:11,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:11,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:25:11,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497098175] [2021-06-05 06:25:11,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:11,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:11,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:11,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:11,657 INFO L87 Difference]: Start difference. First operand 7692 states and 26191 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:12,546 INFO L93 Difference]: Finished difference Result 9596 states and 32348 transitions. [2021-06-05 06:25:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:25:12,546 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:12,562 INFO L225 Difference]: With dead ends: 9596 [2021-06-05 06:25:12,562 INFO L226 Difference]: Without dead ends: 9581 [2021-06-05 06:25:12,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 766.9ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:25:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2021-06-05 06:25:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 7697. [2021-06-05 06:25:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.4056652806652807) internal successors, (26210), 7696 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26210 transitions. [2021-06-05 06:25:12,720 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26210 transitions. Word has length 30 [2021-06-05 06:25:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:12,720 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26210 transitions. [2021-06-05 06:25:12,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26210 transitions. [2021-06-05 06:25:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:12,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:12,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:12,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:12,930 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:12,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:12,930 INFO L82 PathProgramCache]: Analyzing trace with hash -951187922, now seen corresponding path program 134 times [2021-06-05 06:25:12,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:12,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442259206] [2021-06-05 06:25:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:13,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:13,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442259206] [2021-06-05 06:25:13,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442259206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:13,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742820165] [2021-06-05 06:25:13,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:13,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:13,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:13,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:25:13,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:13,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:13,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:13,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:25:13,416 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:13,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:13,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:13,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:25:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:13,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742820165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:13,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:13,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:25:13,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075030460] [2021-06-05 06:25:13,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:13,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:13,474 INFO L87 Difference]: Start difference. First operand 7697 states and 26210 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:14,706 INFO L93 Difference]: Finished difference Result 9964 states and 33540 transitions. [2021-06-05 06:25:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:25:14,706 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:14,723 INFO L225 Difference]: With dead ends: 9964 [2021-06-05 06:25:14,723 INFO L226 Difference]: Without dead ends: 9949 [2021-06-05 06:25:14,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 933.4ms TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:25:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9949 states. [2021-06-05 06:25:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9949 to 7694. [2021-06-05 06:25:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7694 states, 7693 states have (on average 3.4053035226829587) internal successors, (26197), 7693 states have internal predecessors, (26197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 26197 transitions. [2021-06-05 06:25:14,860 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 26197 transitions. Word has length 30 [2021-06-05 06:25:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:14,860 INFO L482 AbstractCegarLoop]: Abstraction has 7694 states and 26197 transitions. [2021-06-05 06:25:14,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 26197 transitions. [2021-06-05 06:25:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:14,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:14,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:15,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 06:25:15,070 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:15,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1739005664, now seen corresponding path program 135 times [2021-06-05 06:25:15,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:15,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584209983] [2021-06-05 06:25:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:15,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:15,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584209983] [2021-06-05 06:25:15,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584209983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:15,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971656896] [2021-06-05 06:25:15,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:15,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:25:15,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:15,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:25:15,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:15,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:15,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:15,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:25:15,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:15,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:15,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:15,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 06:25:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:15,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971656896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:15,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:15,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:25:15,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729109050] [2021-06-05 06:25:15,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:15,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:15,687 INFO L87 Difference]: Start difference. First operand 7694 states and 26197 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:16,315 INFO L93 Difference]: Finished difference Result 9270 states and 31237 transitions. [2021-06-05 06:25:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:25:16,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:16,331 INFO L225 Difference]: With dead ends: 9270 [2021-06-05 06:25:16,331 INFO L226 Difference]: Without dead ends: 9255 [2021-06-05 06:25:16,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 590.8ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:25:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2021-06-05 06:25:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 7697. [2021-06-05 06:25:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.405535343035343) internal successors, (26209), 7696 states have internal predecessors, (26209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26209 transitions. [2021-06-05 06:25:16,448 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26209 transitions. Word has length 30 [2021-06-05 06:25:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:16,448 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26209 transitions. [2021-06-05 06:25:16,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26209 transitions. [2021-06-05 06:25:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:16,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:16,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:16,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:16,658 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1234861006, now seen corresponding path program 136 times [2021-06-05 06:25:16,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:16,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731332738] [2021-06-05 06:25:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:16,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:16,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731332738] [2021-06-05 06:25:16,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731332738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:16,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430198123] [2021-06-05 06:25:16,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:16,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:16,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:25:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:17,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:17,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:25:17,225 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:17,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:17,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:17,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:25:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:17,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430198123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:17,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:17,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:25:17,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281611477] [2021-06-05 06:25:17,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:17,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:17,284 INFO L87 Difference]: Start difference. First operand 7697 states and 26209 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:17,968 INFO L93 Difference]: Finished difference Result 9829 states and 33022 transitions. [2021-06-05 06:25:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:25:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:17,984 INFO L225 Difference]: With dead ends: 9829 [2021-06-05 06:25:17,984 INFO L226 Difference]: Without dead ends: 9810 [2021-06-05 06:25:17,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 662.7ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:25:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-06-05 06:25:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 7693. [2021-06-05 06:25:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7693 states, 7692 states have (on average 3.40535621424857) internal successors, (26194), 7692 states have internal predecessors, (26194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7693 states to 7693 states and 26194 transitions. [2021-06-05 06:25:18,114 INFO L78 Accepts]: Start accepts. Automaton has 7693 states and 26194 transitions. Word has length 30 [2021-06-05 06:25:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:18,114 INFO L482 AbstractCegarLoop]: Abstraction has 7693 states and 26194 transitions. [2021-06-05 06:25:18,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7693 states and 26194 transitions. [2021-06-05 06:25:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:18,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:18,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:18,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:18,324 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1901077732, now seen corresponding path program 137 times [2021-06-05 06:25:18,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:18,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035286368] [2021-06-05 06:25:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:18,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:18,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035286368] [2021-06-05 06:25:18,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035286368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:18,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137157333] [2021-06-05 06:25:18,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:18,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:25:18,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:18,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:25:18,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:18,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:18,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:18,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:25:18,851 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:18,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:18,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:18,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:25:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:18,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137157333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:18,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:18,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:25:18,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630005014] [2021-06-05 06:25:18,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:25:18,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:18,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:25:18,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:25:18,947 INFO L87 Difference]: Start difference. First operand 7693 states and 26194 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:20,024 INFO L93 Difference]: Finished difference Result 9812 states and 32964 transitions. [2021-06-05 06:25:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:25:20,025 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:20,041 INFO L225 Difference]: With dead ends: 9812 [2021-06-05 06:25:20,041 INFO L226 Difference]: Without dead ends: 9774 [2021-06-05 06:25:20,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 869.7ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:25:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2021-06-05 06:25:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 7691. [2021-06-05 06:25:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.4054616384915475) internal successors, (26188), 7690 states have internal predecessors, (26188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 26188 transitions. [2021-06-05 06:25:20,175 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 26188 transitions. Word has length 30 [2021-06-05 06:25:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:20,175 INFO L482 AbstractCegarLoop]: Abstraction has 7691 states and 26188 transitions. [2021-06-05 06:25:20,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 26188 transitions. [2021-06-05 06:25:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:20,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:20,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:20,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 06:25:20,386 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:20,386 INFO L82 PathProgramCache]: Analyzing trace with hash 78542928, now seen corresponding path program 138 times [2021-06-05 06:25:20,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:20,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024206297] [2021-06-05 06:25:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:20,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:20,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024206297] [2021-06-05 06:25:20,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024206297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:20,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050548556] [2021-06-05 06:25:20,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:20,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:25:20,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:20,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:25:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:20,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:20,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:20,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 06:25:20,893 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:20,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:20,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:20,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:25:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:20,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050548556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:20,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:20,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:25:20,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726851729] [2021-06-05 06:25:20,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:25:20,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:20,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:25:20,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:25:20,973 INFO L87 Difference]: Start difference. First operand 7691 states and 26188 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:22,717 INFO L93 Difference]: Finished difference Result 9869 states and 33063 transitions. [2021-06-05 06:25:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:25:22,717 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:22,734 INFO L225 Difference]: With dead ends: 9869 [2021-06-05 06:25:22,734 INFO L226 Difference]: Without dead ends: 9833 [2021-06-05 06:25:22,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1173.9ms TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:25:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2021-06-05 06:25:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 7688. [2021-06-05 06:25:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 3.4041888903343307) internal successors, (26168), 7687 states have internal predecessors, (26168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 26168 transitions. [2021-06-05 06:25:22,866 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 26168 transitions. Word has length 30 [2021-06-05 06:25:22,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:22,866 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 26168 transitions. [2021-06-05 06:25:22,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 26168 transitions. [2021-06-05 06:25:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:22,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:22,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:23,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 06:25:23,081 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1358479268, now seen corresponding path program 139 times [2021-06-05 06:25:23,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:23,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077787479] [2021-06-05 06:25:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:23,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077787479] [2021-06-05 06:25:23,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077787479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461045499] [2021-06-05 06:25:23,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:23,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:25:23,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:23,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:23,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:23,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:25:23,585 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:23,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:23,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:23,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:25:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:23,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461045499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:23,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:23,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:25:23,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749792987] [2021-06-05 06:25:23,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:23,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:23,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:23,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:23,647 INFO L87 Difference]: Start difference. First operand 7688 states and 26168 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:24,501 INFO L93 Difference]: Finished difference Result 10287 states and 34404 transitions. [2021-06-05 06:25:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:25:24,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:24,517 INFO L225 Difference]: With dead ends: 10287 [2021-06-05 06:25:24,518 INFO L226 Difference]: Without dead ends: 10237 [2021-06-05 06:25:24,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 748.3ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:25:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-06-05 06:25:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 7690. [2021-06-05 06:25:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.404343867863181) internal successors, (26176), 7689 states have internal predecessors, (26176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26176 transitions. [2021-06-05 06:25:24,650 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26176 transitions. Word has length 30 [2021-06-05 06:25:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:24,650 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26176 transitions. [2021-06-05 06:25:24,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26176 transitions. [2021-06-05 06:25:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:24,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:24,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:24,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 06:25:24,860 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash -268655640, now seen corresponding path program 140 times [2021-06-05 06:25:24,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:24,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115369177] [2021-06-05 06:25:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:25,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:25,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115369177] [2021-06-05 06:25:25,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115369177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:25,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724340941] [2021-06-05 06:25:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:25,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:25,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:25,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:25:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:25,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:25,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:25,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:25,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:25:25,411 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:25,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:25,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:25,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:25:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:25,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724340941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:25,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:25,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:25:25,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847408687] [2021-06-05 06:25:25,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:25:25,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:25,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:25:25,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:25:25,499 INFO L87 Difference]: Start difference. First operand 7690 states and 26176 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:26,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:26,104 INFO L93 Difference]: Finished difference Result 9773 states and 32852 transitions. [2021-06-05 06:25:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:25:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:26,120 INFO L225 Difference]: With dead ends: 9773 [2021-06-05 06:25:26,120 INFO L226 Difference]: Without dead ends: 9749 [2021-06-05 06:25:26,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 658.7ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:25:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9749 states. [2021-06-05 06:25:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9749 to 7684. [2021-06-05 06:25:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7684 states, 7683 states have (on average 3.404139008199922) internal successors, (26154), 7683 states have internal predecessors, (26154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7684 states to 7684 states and 26154 transitions. [2021-06-05 06:25:26,240 INFO L78 Accepts]: Start accepts. Automaton has 7684 states and 26154 transitions. Word has length 30 [2021-06-05 06:25:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:26,240 INFO L482 AbstractCegarLoop]: Abstraction has 7684 states and 26154 transitions. [2021-06-05 06:25:26,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 7684 states and 26154 transitions. [2021-06-05 06:25:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:26,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:26,250 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:26,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:26,451 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1727704690, now seen corresponding path program 141 times [2021-06-05 06:25:26,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:26,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582167462] [2021-06-05 06:25:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:26,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:26,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582167462] [2021-06-05 06:25:26,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582167462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:26,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814722009] [2021-06-05 06:25:26,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:26,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:25:26,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:25:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:27,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:27,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:25:27,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:27,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:27,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:27,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 06:25:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:27,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814722009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:27,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:27,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:25:27,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741433025] [2021-06-05 06:25:27,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:25:27,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:27,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:25:27,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:25:27,045 INFO L87 Difference]: Start difference. First operand 7684 states and 26154 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:27,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:27,769 INFO L93 Difference]: Finished difference Result 9322 states and 31376 transitions. [2021-06-05 06:25:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:25:27,769 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:27,783 INFO L225 Difference]: With dead ends: 9322 [2021-06-05 06:25:27,784 INFO L226 Difference]: Without dead ends: 9307 [2021-06-05 06:25:27,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 631.7ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:25:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-06-05 06:25:27,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 7687. [2021-06-05 06:25:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7687 states, 7686 states have (on average 3.4043715846994536) internal successors, (26166), 7686 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 26166 transitions. [2021-06-05 06:25:27,898 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 26166 transitions. Word has length 30 [2021-06-05 06:25:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:27,898 INFO L482 AbstractCegarLoop]: Abstraction has 7687 states and 26166 transitions. [2021-06-05 06:25:27,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 26166 transitions. [2021-06-05 06:25:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:27,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:27,908 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:28,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:28,108 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:28,108 INFO L82 PathProgramCache]: Analyzing trace with hash -491829020, now seen corresponding path program 142 times [2021-06-05 06:25:28,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:28,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135808962] [2021-06-05 06:25:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:28,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:28,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135808962] [2021-06-05 06:25:28,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135808962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:28,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054001074] [2021-06-05 06:25:28,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:28,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:28,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:28,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:25:28,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:28,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:28,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:25:28,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:28,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:28,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:28,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:25:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:28,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054001074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:28,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:28,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 06:25:28,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098878015] [2021-06-05 06:25:28,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:25:28,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:28,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:25:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:25:28,770 INFO L87 Difference]: Start difference. First operand 7687 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:30,166 INFO L93 Difference]: Finished difference Result 10068 states and 33705 transitions. [2021-06-05 06:25:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:25:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:30,183 INFO L225 Difference]: With dead ends: 10068 [2021-06-05 06:25:30,184 INFO L226 Difference]: Without dead ends: 10022 [2021-06-05 06:25:30,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1037.8ms TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:25:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2021-06-05 06:25:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 7692. [2021-06-05 06:25:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4039786763749835) internal successors, (26180), 7691 states have internal predecessors, (26180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26180 transitions. [2021-06-05 06:25:30,316 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26180 transitions. Word has length 30 [2021-06-05 06:25:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:30,316 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26180 transitions. [2021-06-05 06:25:30,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26180 transitions. [2021-06-05 06:25:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:30,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:30,326 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:30,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 06:25:30,526 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:30,527 INFO L82 PathProgramCache]: Analyzing trace with hash -245264536, now seen corresponding path program 143 times [2021-06-05 06:25:30,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:30,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131161750] [2021-06-05 06:25:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:30,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:30,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131161750] [2021-06-05 06:25:30,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131161750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:30,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145389757] [2021-06-05 06:25:30,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:30,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:25:30,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:25:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:31,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:31,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:25:31,097 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:31,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:31,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:31,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:25:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:31,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145389757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:31,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:31,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 06:25:31,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109217134] [2021-06-05 06:25:31,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:25:31,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:31,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:25:31,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:25:31,194 INFO L87 Difference]: Start difference. First operand 7692 states and 26180 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:31,963 INFO L93 Difference]: Finished difference Result 10182 states and 34192 transitions. [2021-06-05 06:25:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:25:31,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:31,980 INFO L225 Difference]: With dead ends: 10182 [2021-06-05 06:25:31,980 INFO L226 Difference]: Without dead ends: 10135 [2021-06-05 06:25:31,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 725.4ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:25:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10135 states. [2021-06-05 06:25:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10135 to 7690. [2021-06-05 06:25:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.403953700091039) internal successors, (26173), 7689 states have internal predecessors, (26173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26173 transitions. [2021-06-05 06:25:32,109 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26173 transitions. Word has length 30 [2021-06-05 06:25:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:32,109 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26173 transitions. [2021-06-05 06:25:32,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26173 transitions. [2021-06-05 06:25:32,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:32,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:32,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:32,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 06:25:32,319 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:32,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:32,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1319108140, now seen corresponding path program 144 times [2021-06-05 06:25:32,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:32,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104919400] [2021-06-05 06:25:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:32,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:32,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104919400] [2021-06-05 06:25:32,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104919400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:32,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361764620] [2021-06-05 06:25:32,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:32,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:25:32,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:32,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:25:32,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:32,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:32,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:32,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 06:25:32,805 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:32,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:32,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:32,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:25:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:32,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361764620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:32,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:32,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:25:32,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275036613] [2021-06-05 06:25:32,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:32,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:32,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:32,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:32,900 INFO L87 Difference]: Start difference. First operand 7690 states and 26173 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:34,381 INFO L93 Difference]: Finished difference Result 9796 states and 32963 transitions. [2021-06-05 06:25:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:25:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:34,397 INFO L225 Difference]: With dead ends: 9796 [2021-06-05 06:25:34,397 INFO L226 Difference]: Without dead ends: 9761 [2021-06-05 06:25:34,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1229.3ms TimeCoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:25:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9761 states. [2021-06-05 06:25:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9761 to 7708. [2021-06-05 06:25:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 3.40352925911509) internal successors, (26231), 7707 states have internal predecessors, (26231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 26231 transitions. [2021-06-05 06:25:34,526 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 26231 transitions. Word has length 30 [2021-06-05 06:25:34,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:34,526 INFO L482 AbstractCegarLoop]: Abstraction has 7708 states and 26231 transitions. [2021-06-05 06:25:34,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 26231 transitions. [2021-06-05 06:25:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:34,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:34,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:34,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:34,737 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:34,737 INFO L82 PathProgramCache]: Analyzing trace with hash -331160296, now seen corresponding path program 145 times [2021-06-05 06:25:34,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:34,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996851578] [2021-06-05 06:25:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:34,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:34,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996851578] [2021-06-05 06:25:34,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996851578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:34,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396059196] [2021-06-05 06:25:34,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:35,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:25:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:35,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:35,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:25:35,230 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:35,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:35,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:35,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:25:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:35,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396059196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:35,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:35,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:25:35,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101671151] [2021-06-05 06:25:35,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:25:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:25:35,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:25:35,332 INFO L87 Difference]: Start difference. First operand 7708 states and 26231 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:36,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:36,457 INFO L93 Difference]: Finished difference Result 9863 states and 33168 transitions. [2021-06-05 06:25:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:25:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:36,475 INFO L225 Difference]: With dead ends: 9863 [2021-06-05 06:25:36,475 INFO L226 Difference]: Without dead ends: 9828 [2021-06-05 06:25:36,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 775.2ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:25:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2021-06-05 06:25:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 7722. [2021-06-05 06:25:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7722 states, 7721 states have (on average 3.4030565988861547) internal successors, (26275), 7721 states have internal predecessors, (26275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7722 states to 7722 states and 26275 transitions. [2021-06-05 06:25:36,612 INFO L78 Accepts]: Start accepts. Automaton has 7722 states and 26275 transitions. Word has length 30 [2021-06-05 06:25:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:36,612 INFO L482 AbstractCegarLoop]: Abstraction has 7722 states and 26275 transitions. [2021-06-05 06:25:36,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 7722 states and 26275 transitions. [2021-06-05 06:25:36,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:36,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:36,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:36,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 06:25:36,823 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:36,823 INFO L82 PathProgramCache]: Analyzing trace with hash -276295984, now seen corresponding path program 146 times [2021-06-05 06:25:36,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:36,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199182513] [2021-06-05 06:25:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:37,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:37,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199182513] [2021-06-05 06:25:37,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199182513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:37,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011573579] [2021-06-05 06:25:37,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:37,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:37,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:37,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:25:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:37,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:37,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:25:37,301 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:37,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:37,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:37,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:25:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:37,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011573579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:37,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:37,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:25:37,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657577162] [2021-06-05 06:25:37,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:37,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:37,393 INFO L87 Difference]: Start difference. First operand 7722 states and 26275 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:38,762 INFO L93 Difference]: Finished difference Result 10221 states and 34332 transitions. [2021-06-05 06:25:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:25:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:38,778 INFO L225 Difference]: With dead ends: 10221 [2021-06-05 06:25:38,778 INFO L226 Difference]: Without dead ends: 10142 [2021-06-05 06:25:38,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1048.6ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:25:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-06-05 06:25:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 7745. [2021-06-05 06:25:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7745 states, 7744 states have (on average 3.4021177685950414) internal successors, (26346), 7744 states have internal predecessors, (26346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7745 states to 7745 states and 26346 transitions. [2021-06-05 06:25:38,904 INFO L78 Accepts]: Start accepts. Automaton has 7745 states and 26346 transitions. Word has length 30 [2021-06-05 06:25:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:38,904 INFO L482 AbstractCegarLoop]: Abstraction has 7745 states and 26346 transitions. [2021-06-05 06:25:38,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7745 states and 26346 transitions. [2021-06-05 06:25:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:38,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:38,914 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:39,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:39,115 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash -781961368, now seen corresponding path program 147 times [2021-06-05 06:25:39,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:39,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917687135] [2021-06-05 06:25:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:39,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:39,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917687135] [2021-06-05 06:25:39,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917687135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:39,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973844472] [2021-06-05 06:25:39,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:39,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:25:39,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:39,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:25:39,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:39,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:39,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 06:25:39,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:39,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:39,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:39,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:282 [2021-06-05 06:25:39,961 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 06:25:40,226 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 06:25:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:40,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973844472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:40,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:40,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:25:40,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481030882] [2021-06-05 06:25:40,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:25:40,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:40,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:25:40,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:25:40,397 INFO L87 Difference]: Start difference. First operand 7745 states and 26346 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:41,184 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2021-06-05 06:25:42,077 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-06-05 06:25:42,493 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-06-05 06:25:43,831 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 06:25:44,267 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-06-05 06:25:44,434 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-06-05 06:25:44,820 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-05 06:25:45,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:45,114 INFO L93 Difference]: Finished difference Result 11812 states and 39325 transitions. [2021-06-05 06:25:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:25:45,115 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:45,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:45,135 INFO L225 Difference]: With dead ends: 11812 [2021-06-05 06:25:45,135 INFO L226 Difference]: Without dead ends: 11727 [2021-06-05 06:25:45,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 3972.7ms TimeCoverageRelationStatistics Valid=427, Invalid=2879, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:25:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11727 states. [2021-06-05 06:25:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11727 to 7810. [2021-06-05 06:25:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7810 states, 7809 states have (on average 3.4061979766935586) internal successors, (26599), 7809 states have internal predecessors, (26599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 26599 transitions. [2021-06-05 06:25:45,282 INFO L78 Accepts]: Start accepts. Automaton has 7810 states and 26599 transitions. Word has length 30 [2021-06-05 06:25:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:45,282 INFO L482 AbstractCegarLoop]: Abstraction has 7810 states and 26599 transitions. [2021-06-05 06:25:45,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 7810 states and 26599 transitions. [2021-06-05 06:25:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:45,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:45,292 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:45,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:45,493 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:45,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:45,493 INFO L82 PathProgramCache]: Analyzing trace with hash 788028937, now seen corresponding path program 50 times [2021-06-05 06:25:45,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:45,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88175540] [2021-06-05 06:25:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:45,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88175540] [2021-06-05 06:25:45,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88175540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848567814] [2021-06-05 06:25:45,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:45,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:45,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:45,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:25:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:46,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:46,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:46,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:46,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:25:46,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:46,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:46,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:46,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 06:25:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:46,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848567814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:46,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:46,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 06:25:46,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110792416] [2021-06-05 06:25:46,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:25:46,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:25:46,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:25:46,126 INFO L87 Difference]: Start difference. First operand 7810 states and 26599 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:46,952 INFO L93 Difference]: Finished difference Result 9430 states and 31554 transitions. [2021-06-05 06:25:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:25:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:46,969 INFO L225 Difference]: With dead ends: 9430 [2021-06-05 06:25:46,969 INFO L226 Difference]: Without dead ends: 9404 [2021-06-05 06:25:46,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 913.4ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:25:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-06-05 06:25:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7836. [2021-06-05 06:25:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.4031908104658584) internal successors, (26664), 7835 states have internal predecessors, (26664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 26664 transitions. [2021-06-05 06:25:47,130 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 26664 transitions. Word has length 30 [2021-06-05 06:25:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:47,130 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 26664 transitions. [2021-06-05 06:25:47,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:47,130 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 26664 transitions. [2021-06-05 06:25:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:47,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:47,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:47,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 06:25:47,341 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:47,341 INFO L82 PathProgramCache]: Analyzing trace with hash 50056363, now seen corresponding path program 51 times [2021-06-05 06:25:47,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:47,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047078353] [2021-06-05 06:25:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:47,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:47,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047078353] [2021-06-05 06:25:47,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047078353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:47,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748691621] [2021-06-05 06:25:47,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:47,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:25:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:25:47,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:48,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:48,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:48,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:48,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:25:48,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:48,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:48,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:48,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:25:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:48,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748691621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:48,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:48,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:25:48,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210756341] [2021-06-05 06:25:48,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:25:48,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:48,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:25:48,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:25:48,070 INFO L87 Difference]: Start difference. First operand 7836 states and 26664 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:50,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:50,175 INFO L93 Difference]: Finished difference Result 9653 states and 32165 transitions. [2021-06-05 06:25:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:25:50,176 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:50,191 INFO L225 Difference]: With dead ends: 9653 [2021-06-05 06:25:50,191 INFO L226 Difference]: Without dead ends: 9638 [2021-06-05 06:25:50,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1535.7ms TimeCoverageRelationStatistics Valid=317, Invalid=2335, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:25:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9638 states. [2021-06-05 06:25:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9638 to 7836. [2021-06-05 06:25:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.4031908104658584) internal successors, (26664), 7835 states have internal predecessors, (26664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 26664 transitions. [2021-06-05 06:25:50,312 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 26664 transitions. Word has length 30 [2021-06-05 06:25:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:50,313 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 26664 transitions. [2021-06-05 06:25:50,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 26664 transitions. [2021-06-05 06:25:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:50,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:50,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:50,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:50,525 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1431852029, now seen corresponding path program 52 times [2021-06-05 06:25:50,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:50,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255748628] [2021-06-05 06:25:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:50,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255748628] [2021-06-05 06:25:50,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255748628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007228027] [2021-06-05 06:25:50,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:50,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:50,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:50,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:25:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:51,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:51,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:51,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:51,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:25:51,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:51,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:51,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:51,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 06:25:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:51,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007228027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:51,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:51,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 06:25:51,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998089208] [2021-06-05 06:25:51,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:25:51,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:25:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:25:51,131 INFO L87 Difference]: Start difference. First operand 7836 states and 26664 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:52,314 INFO L93 Difference]: Finished difference Result 9381 states and 31423 transitions. [2021-06-05 06:25:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:25:52,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:52,328 INFO L225 Difference]: With dead ends: 9381 [2021-06-05 06:25:52,329 INFO L226 Difference]: Without dead ends: 9355 [2021-06-05 06:25:52,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1246.8ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:25:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9355 states. [2021-06-05 06:25:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9355 to 7848. [2021-06-05 06:25:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.401809608767682) internal successors, (26694), 7847 states have internal predecessors, (26694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 26694 transitions. [2021-06-05 06:25:52,453 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 26694 transitions. Word has length 30 [2021-06-05 06:25:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:52,453 INFO L482 AbstractCegarLoop]: Abstraction has 7848 states and 26694 transitions. [2021-06-05 06:25:52,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 26694 transitions. [2021-06-05 06:25:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:52,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:52,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:52,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:52,675 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:52,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1082463897, now seen corresponding path program 53 times [2021-06-05 06:25:52,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:52,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637518471] [2021-06-05 06:25:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:53,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:53,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637518471] [2021-06-05 06:25:53,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637518471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:53,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502241947] [2021-06-05 06:25:53,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:53,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:25:53,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:53,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:25:53,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:53,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:53,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:53,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:25:53,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:53,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:53,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:53,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 06:25:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:53,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502241947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:53,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:53,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 06:25:53,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265845424] [2021-06-05 06:25:53,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:25:53,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:53,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:25:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:25:53,305 INFO L87 Difference]: Start difference. First operand 7848 states and 26694 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:54,246 INFO L93 Difference]: Finished difference Result 9369 states and 31402 transitions. [2021-06-05 06:25:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:25:54,246 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:54,261 INFO L225 Difference]: With dead ends: 9369 [2021-06-05 06:25:54,261 INFO L226 Difference]: Without dead ends: 9354 [2021-06-05 06:25:54,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 972.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:25:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9354 states. [2021-06-05 06:25:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9354 to 7848. [2021-06-05 06:25:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.401809608767682) internal successors, (26694), 7847 states have internal predecessors, (26694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 26694 transitions. [2021-06-05 06:25:54,378 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 26694 transitions. Word has length 30 [2021-06-05 06:25:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:54,378 INFO L482 AbstractCegarLoop]: Abstraction has 7848 states and 26694 transitions. [2021-06-05 06:25:54,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 26694 transitions. [2021-06-05 06:25:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:54,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:54,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:54,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-05 06:25:54,593 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash 704274543, now seen corresponding path program 54 times [2021-06-05 06:25:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:54,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862084033] [2021-06-05 06:25:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:54,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:54,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862084033] [2021-06-05 06:25:54,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862084033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:54,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900866132] [2021-06-05 06:25:54,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:54,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:25:54,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:54,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:25:54,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:55,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:55,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:55,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:55,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:55,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:25:55,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:55,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:55,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:55,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:25:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:55,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900866132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:55,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:55,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 06:25:55,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660667726] [2021-06-05 06:25:55,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:55,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:55,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:55,157 INFO L87 Difference]: Start difference. First operand 7848 states and 26694 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:56,428 INFO L93 Difference]: Finished difference Result 9087 states and 30043 transitions. [2021-06-05 06:25:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:25:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:56,443 INFO L225 Difference]: With dead ends: 9087 [2021-06-05 06:25:56,444 INFO L226 Difference]: Without dead ends: 9057 [2021-06-05 06:25:56,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1279.9ms TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:25:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-06-05 06:25:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7888. [2021-06-05 06:25:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7888 states, 7887 states have (on average 3.398250285279574) internal successors, (26802), 7887 states have internal predecessors, (26802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7888 states to 7888 states and 26802 transitions. [2021-06-05 06:25:56,566 INFO L78 Accepts]: Start accepts. Automaton has 7888 states and 26802 transitions. Word has length 30 [2021-06-05 06:25:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:56,566 INFO L482 AbstractCegarLoop]: Abstraction has 7888 states and 26802 transitions. [2021-06-05 06:25:56,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7888 states and 26802 transitions. [2021-06-05 06:25:56,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:56,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:56,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:56,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:56,776 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:56,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:56,776 INFO L82 PathProgramCache]: Analyzing trace with hash 742037125, now seen corresponding path program 55 times [2021-06-05 06:25:56,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:56,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461350140] [2021-06-05 06:25:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:57,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:57,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461350140] [2021-06-05 06:25:57,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461350140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:57,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953059376] [2021-06-05 06:25:57,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:25:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:57,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:57,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:57,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:57,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:25:57,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:57,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:57,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:25:57,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:25:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:57,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953059376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:57,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:57,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:25:57,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302296405] [2021-06-05 06:25:57,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:25:57,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:57,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:25:57,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:25:57,426 INFO L87 Difference]: Start difference. First operand 7888 states and 26802 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:59,297 INFO L93 Difference]: Finished difference Result 9802 states and 32822 transitions. [2021-06-05 06:25:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:25:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:25:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:59,312 INFO L225 Difference]: With dead ends: 9802 [2021-06-05 06:25:59,313 INFO L226 Difference]: Without dead ends: 9740 [2021-06-05 06:25:59,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1683.5ms TimeCoverageRelationStatistics Valid=576, Invalid=2964, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:25:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9740 states. [2021-06-05 06:25:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9740 to 7900. [2021-06-05 06:25:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 3.396885681731865) internal successors, (26832), 7899 states have internal predecessors, (26832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 26832 transitions. [2021-06-05 06:25:59,491 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 26832 transitions. Word has length 30 [2021-06-05 06:25:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:59,492 INFO L482 AbstractCegarLoop]: Abstraction has 7900 states and 26832 transitions. [2021-06-05 06:25:59,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 26832 transitions. [2021-06-05 06:25:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:25:59,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:59,502 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:59,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:59,703 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1402383373, now seen corresponding path program 56 times [2021-06-05 06:25:59,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:59,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498009046] [2021-06-05 06:25:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:00,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:00,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498009046] [2021-06-05 06:26:00,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498009046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:00,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619869061] [2021-06-05 06:26:00,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:00,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:26:00,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:26:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:00,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:00,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:00,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:00,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:26:00,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:00,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:00,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:00,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:26:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:00,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619869061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:00,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:00,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:26:00,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279731680] [2021-06-05 06:26:00,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:00,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:00,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:00,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:00,276 INFO L87 Difference]: Start difference. First operand 7900 states and 26832 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:01,602 INFO L93 Difference]: Finished difference Result 9832 states and 32876 transitions. [2021-06-05 06:26:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:26:01,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:01,619 INFO L225 Difference]: With dead ends: 9832 [2021-06-05 06:26:01,619 INFO L226 Difference]: Without dead ends: 9778 [2021-06-05 06:26:01,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1162.4ms TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:26:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-06-05 06:26:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7906. [2021-06-05 06:26:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7906 states, 7905 states have (on average 3.3964579380139153) internal successors, (26849), 7905 states have internal predecessors, (26849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7906 states to 7906 states and 26849 transitions. [2021-06-05 06:26:01,742 INFO L78 Accepts]: Start accepts. Automaton has 7906 states and 26849 transitions. Word has length 30 [2021-06-05 06:26:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:01,742 INFO L482 AbstractCegarLoop]: Abstraction has 7906 states and 26849 transitions. [2021-06-05 06:26:01,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 7906 states and 26849 transitions. [2021-06-05 06:26:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:01,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:01,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:01,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:01,953 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash -754295013, now seen corresponding path program 57 times [2021-06-05 06:26:01,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:01,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306471999] [2021-06-05 06:26:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:02,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:02,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306471999] [2021-06-05 06:26:02,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306471999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:02,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510050420] [2021-06-05 06:26:02,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:02,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:26:02,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:26:02,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:02,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:02,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:02,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:02,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:26:02,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:02,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:02,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:02,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-06-05 06:26:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:02,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510050420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:02,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:02,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 06:26:02,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589005436] [2021-06-05 06:26:02,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:26:02,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:02,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:26:02,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:26:02,679 INFO L87 Difference]: Start difference. First operand 7906 states and 26849 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:05,207 INFO L93 Difference]: Finished difference Result 9776 states and 32529 transitions. [2021-06-05 06:26:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:26:05,207 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:05,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:05,223 INFO L225 Difference]: With dead ends: 9776 [2021-06-05 06:26:05,223 INFO L226 Difference]: Without dead ends: 9693 [2021-06-05 06:26:05,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1945.9ms TimeCoverageRelationStatistics Valid=484, Invalid=3806, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:26:05,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9693 states. [2021-06-05 06:26:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9693 to 7982. [2021-06-05 06:26:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7982 states, 7981 states have (on average 3.3914296454078436) internal successors, (27067), 7981 states have internal predecessors, (27067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7982 states to 7982 states and 27067 transitions. [2021-06-05 06:26:05,348 INFO L78 Accepts]: Start accepts. Automaton has 7982 states and 27067 transitions. Word has length 30 [2021-06-05 06:26:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:05,348 INFO L482 AbstractCegarLoop]: Abstraction has 7982 states and 27067 transitions. [2021-06-05 06:26:05,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7982 states and 27067 transitions. [2021-06-05 06:26:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:05,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:05,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:05,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 06:26:05,558 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash -716532431, now seen corresponding path program 58 times [2021-06-05 06:26:05,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:05,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41531080] [2021-06-05 06:26:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:05,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:05,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41531080] [2021-06-05 06:26:05,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41531080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:05,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3177746] [2021-06-05 06:26:05,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:05,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:26:05,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:05,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:26:05,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:06,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:06,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:06,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:06,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:26:06,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:06,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:06,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:06,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 06:26:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:06,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3177746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:06,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:06,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 06:26:06,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759675250] [2021-06-05 06:26:06,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:26:06,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:06,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:26:06,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:26:06,157 INFO L87 Difference]: Start difference. First operand 7982 states and 27067 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:07,639 INFO L93 Difference]: Finished difference Result 9883 states and 33050 transitions. [2021-06-05 06:26:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:26:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:07,656 INFO L225 Difference]: With dead ends: 9883 [2021-06-05 06:26:07,656 INFO L226 Difference]: Without dead ends: 9857 [2021-06-05 06:26:07,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1410.1ms TimeCoverageRelationStatistics Valid=420, Invalid=1932, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:26:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9857 states. [2021-06-05 06:26:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 7986. [2021-06-05 06:26:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 7985 states have (on average 3.3909830932999374) internal successors, (27077), 7985 states have internal predecessors, (27077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 27077 transitions. [2021-06-05 06:26:07,780 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 27077 transitions. Word has length 30 [2021-06-05 06:26:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:07,780 INFO L482 AbstractCegarLoop]: Abstraction has 7986 states and 27077 transitions. [2021-06-05 06:26:07,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 27077 transitions. [2021-06-05 06:26:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:07,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:07,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:07,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:07,994 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -953383713, now seen corresponding path program 59 times [2021-06-05 06:26:07,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:07,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272785033] [2021-06-05 06:26:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:08,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:08,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272785033] [2021-06-05 06:26:08,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272785033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:08,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557672478] [2021-06-05 06:26:08,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:08,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:26:08,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:08,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:26:08,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:08,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:08,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:08,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:08,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:08,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:26:08,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:08,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:08,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:08,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-06-05 06:26:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:08,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557672478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:08,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:08,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:26:08,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737286118] [2021-06-05 06:26:08,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:08,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:08,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:08,675 INFO L87 Difference]: Start difference. First operand 7986 states and 27077 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:09,652 INFO L93 Difference]: Finished difference Result 9410 states and 31546 transitions. [2021-06-05 06:26:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:26:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:09,669 INFO L225 Difference]: With dead ends: 9410 [2021-06-05 06:26:09,669 INFO L226 Difference]: Without dead ends: 9384 [2021-06-05 06:26:09,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1083.5ms TimeCoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:26:09,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9384 states. [2021-06-05 06:26:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9384 to 7986. [2021-06-05 06:26:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 7985 states have (on average 3.3909830932999374) internal successors, (27077), 7985 states have internal predecessors, (27077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 27077 transitions. [2021-06-05 06:26:09,796 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 27077 transitions. Word has length 30 [2021-06-05 06:26:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:09,796 INFO L482 AbstractCegarLoop]: Abstraction has 7986 states and 27077 transitions. [2021-06-05 06:26:09,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 27077 transitions. [2021-06-05 06:26:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:09,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:09,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:10,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-06-05 06:26:10,008 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:10,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:10,008 INFO L82 PathProgramCache]: Analyzing trace with hash -664551470, now seen corresponding path program 148 times [2021-06-05 06:26:10,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:10,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950664215] [2021-06-05 06:26:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:10,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950664215] [2021-06-05 06:26:10,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950664215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248751400] [2021-06-05 06:26:10,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:10,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:26:10,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:10,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:26:10,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:10,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:10,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:10,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:26:10,584 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:10,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:10,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:10,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:26:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:10,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248751400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:10,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:10,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:26:10,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698313819] [2021-06-05 06:26:10,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:26:10,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:26:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:26:10,646 INFO L87 Difference]: Start difference. First operand 7986 states and 27077 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:12,179 INFO L93 Difference]: Finished difference Result 10995 states and 36694 transitions. [2021-06-05 06:26:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:26:12,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:12,244 INFO L225 Difference]: With dead ends: 10995 [2021-06-05 06:26:12,245 INFO L226 Difference]: Without dead ends: 10970 [2021-06-05 06:26:12,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1281.1ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:26:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10970 states. [2021-06-05 06:26:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10970 to 8000. [2021-06-05 06:26:12,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8000 states, 7999 states have (on average 3.3905488186023254) internal successors, (27121), 7999 states have internal predecessors, (27121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8000 states to 8000 states and 27121 transitions. [2021-06-05 06:26:12,374 INFO L78 Accepts]: Start accepts. Automaton has 8000 states and 27121 transitions. Word has length 30 [2021-06-05 06:26:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:12,374 INFO L482 AbstractCegarLoop]: Abstraction has 8000 states and 27121 transitions. [2021-06-05 06:26:12,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 8000 states and 27121 transitions. [2021-06-05 06:26:12,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:12,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:12,385 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:12,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 06:26:12,586 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:12,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:12,586 INFO L82 PathProgramCache]: Analyzing trace with hash 853941454, now seen corresponding path program 149 times [2021-06-05 06:26:12,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:12,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568279616] [2021-06-05 06:26:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:12,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:12,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568279616] [2021-06-05 06:26:12,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568279616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:12,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362366505] [2021-06-05 06:26:12,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:12,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:26:12,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:26:12,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:13,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:13,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:13,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:26:13,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:13,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:13,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:13,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-06-05 06:26:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:13,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362366505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:13,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:13,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-06-05 06:26:13,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597704195] [2021-06-05 06:26:13,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:26:13,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:13,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:26:13,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:26:13,241 INFO L87 Difference]: Start difference. First operand 8000 states and 27121 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:14,398 INFO L93 Difference]: Finished difference Result 10084 states and 33776 transitions. [2021-06-05 06:26:14,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:26:14,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:14,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:14,414 INFO L225 Difference]: With dead ends: 10084 [2021-06-05 06:26:14,414 INFO L226 Difference]: Without dead ends: 10059 [2021-06-05 06:26:14,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 981.2ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:26:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10059 states. [2021-06-05 06:26:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10059 to 7998. [2021-06-05 06:26:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7998 states, 7997 states have (on average 3.3905214455420785) internal successors, (27114), 7997 states have internal predecessors, (27114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7998 states to 7998 states and 27114 transitions. [2021-06-05 06:26:14,540 INFO L78 Accepts]: Start accepts. Automaton has 7998 states and 27114 transitions. Word has length 30 [2021-06-05 06:26:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:14,540 INFO L482 AbstractCegarLoop]: Abstraction has 7998 states and 27114 transitions. [2021-06-05 06:26:14,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7998 states and 27114 transitions. [2021-06-05 06:26:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:14,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:14,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:14,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:14,751 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:14,751 INFO L82 PathProgramCache]: Analyzing trace with hash 251753802, now seen corresponding path program 150 times [2021-06-05 06:26:14,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:14,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379372251] [2021-06-05 06:26:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:15,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:15,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379372251] [2021-06-05 06:26:15,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379372251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:15,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461978860] [2021-06-05 06:26:15,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:15,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:26:15,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:15,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:26:15,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:15,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:15,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:15,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:26:15,287 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:15,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:15,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:15,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:26:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:15,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461978860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:15,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:15,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:26:15,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793950135] [2021-06-05 06:26:15,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:15,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:15,350 INFO L87 Difference]: Start difference. First operand 7998 states and 27114 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:17,943 INFO L93 Difference]: Finished difference Result 10494 states and 35074 transitions. [2021-06-05 06:26:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:26:17,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:17,961 INFO L225 Difference]: With dead ends: 10494 [2021-06-05 06:26:17,961 INFO L226 Difference]: Without dead ends: 10459 [2021-06-05 06:26:17,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1966.7ms TimeCoverageRelationStatistics Valid=388, Invalid=3152, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:26:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10459 states. [2021-06-05 06:26:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 7994. [2021-06-05 06:26:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 3.390716877267609) internal successors, (27102), 7993 states have internal predecessors, (27102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 27102 transitions. [2021-06-05 06:26:18,096 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 27102 transitions. Word has length 30 [2021-06-05 06:26:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:18,096 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 27102 transitions. [2021-06-05 06:26:18,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 27102 transitions. [2021-06-05 06:26:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:18,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:18,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:18,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 06:26:18,306 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash 573674318, now seen corresponding path program 151 times [2021-06-05 06:26:18,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:18,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861910209] [2021-06-05 06:26:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:18,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:18,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861910209] [2021-06-05 06:26:18,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861910209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:18,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124864718] [2021-06-05 06:26:18,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:26:18,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:18,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:18,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:18,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:18,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 06:26:18,831 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:18,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:18,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:18,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 06:26:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:18,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124864718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:18,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:18,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:26:18,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045613103] [2021-06-05 06:26:18,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:18,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:18,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:18,923 INFO L87 Difference]: Start difference. First operand 7994 states and 27102 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:20,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:20,736 INFO L93 Difference]: Finished difference Result 10167 states and 33996 transitions. [2021-06-05 06:26:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:26:20,736 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:20,752 INFO L225 Difference]: With dead ends: 10167 [2021-06-05 06:26:20,752 INFO L226 Difference]: Without dead ends: 10142 [2021-06-05 06:26:20,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1272.1ms TimeCoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:26:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-06-05 06:26:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 7984. [2021-06-05 06:26:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 3.3899536515094577) internal successors, (27062), 7983 states have internal predecessors, (27062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 27062 transitions. [2021-06-05 06:26:20,879 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 27062 transitions. Word has length 30 [2021-06-05 06:26:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:20,879 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 27062 transitions. [2021-06-05 06:26:20,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 27062 transitions. [2021-06-05 06:26:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:20,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:20,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:21,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 06:26:21,090 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:21,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1259503864, now seen corresponding path program 152 times [2021-06-05 06:26:21,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:21,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112123862] [2021-06-05 06:26:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:21,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:21,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112123862] [2021-06-05 06:26:21,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112123862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:21,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016845287] [2021-06-05 06:26:21,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:21,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:26:21,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:21,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:26:21,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:21,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:21,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:26:21,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:21,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:21,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:21,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 06:26:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:21,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016845287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:21,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:21,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:26:21,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582944262] [2021-06-05 06:26:21,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:26:21,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:21,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:26:21,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:26:21,725 INFO L87 Difference]: Start difference. First operand 7984 states and 27062 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:22,512 INFO L93 Difference]: Finished difference Result 9731 states and 32614 transitions. [2021-06-05 06:26:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:26:22,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:22,529 INFO L225 Difference]: With dead ends: 9731 [2021-06-05 06:26:22,530 INFO L226 Difference]: Without dead ends: 9710 [2021-06-05 06:26:22,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 716.3ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:26:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9710 states. [2021-06-05 06:26:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9710 to 7980. [2021-06-05 06:26:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7980 states, 7979 states have (on average 3.3896478255420477) internal successors, (27046), 7979 states have internal predecessors, (27046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 27046 transitions. [2021-06-05 06:26:22,653 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 27046 transitions. Word has length 30 [2021-06-05 06:26:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:22,653 INFO L482 AbstractCegarLoop]: Abstraction has 7980 states and 27046 transitions. [2021-06-05 06:26:22,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 27046 transitions. [2021-06-05 06:26:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:22,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:22,663 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:22,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:22,863 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:22,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1211576124, now seen corresponding path program 153 times [2021-06-05 06:26:22,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:22,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461500521] [2021-06-05 06:26:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:23,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:23,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461500521] [2021-06-05 06:26:23,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461500521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:23,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905064343] [2021-06-05 06:26:23,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:23,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:26:23,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:23,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:26:23,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:23,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:23,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:23,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:23,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:23,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:23,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 06:26:23,432 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:23,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:23,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:23,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 06:26:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:23,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905064343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:23,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:23,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:26:23,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132858400] [2021-06-05 06:26:23,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:23,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:23,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:23,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:23,526 INFO L87 Difference]: Start difference. First operand 7980 states and 27046 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:24,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:24,343 INFO L93 Difference]: Finished difference Result 9872 states and 33137 transitions. [2021-06-05 06:26:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:26:24,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:24,360 INFO L225 Difference]: With dead ends: 9872 [2021-06-05 06:26:24,360 INFO L226 Difference]: Without dead ends: 9847 [2021-06-05 06:26:24,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 773.5ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:26:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9847 states. [2021-06-05 06:26:24,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9847 to 7958. [2021-06-05 06:26:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 7957 states have (on average 3.390222445645344) internal successors, (26976), 7957 states have internal predecessors, (26976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 26976 transitions. [2021-06-05 06:26:24,526 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 26976 transitions. Word has length 30 [2021-06-05 06:26:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:24,526 INFO L482 AbstractCegarLoop]: Abstraction has 7958 states and 26976 transitions. [2021-06-05 06:26:24,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 26976 transitions. [2021-06-05 06:26:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:24,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:24,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:24,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:24,738 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:24,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1891615694, now seen corresponding path program 154 times [2021-06-05 06:26:24,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:24,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902379299] [2021-06-05 06:26:24,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:24,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:24,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902379299] [2021-06-05 06:26:24,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902379299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:24,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198444128] [2021-06-05 06:26:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:24,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:26:24,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:26:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:25,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:25,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:26:25,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:25,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:25,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:25,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:26:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:25,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198444128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:25,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:25,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:26:25,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593010804] [2021-06-05 06:26:25,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:25,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:25,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:25,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:25,312 INFO L87 Difference]: Start difference. First operand 7958 states and 26976 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:26,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:26,225 INFO L93 Difference]: Finished difference Result 9882 states and 33193 transitions. [2021-06-05 06:26:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:26:26,225 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:26,243 INFO L225 Difference]: With dead ends: 9882 [2021-06-05 06:26:26,243 INFO L226 Difference]: Without dead ends: 9867 [2021-06-05 06:26:26,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 777.4ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:26:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2021-06-05 06:26:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 7963. [2021-06-05 06:26:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.3904797789500125) internal successors, (26995), 7962 states have internal predecessors, (26995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 26995 transitions. [2021-06-05 06:26:26,372 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 26995 transitions. Word has length 30 [2021-06-05 06:26:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:26,372 INFO L482 AbstractCegarLoop]: Abstraction has 7963 states and 26995 transitions. [2021-06-05 06:26:26,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 26995 transitions. [2021-06-05 06:26:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:26,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:26,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:26,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:26,582 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:26,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2145279528, now seen corresponding path program 155 times [2021-06-05 06:26:26,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:26,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854510304] [2021-06-05 06:26:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:26,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:26,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854510304] [2021-06-05 06:26:26,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854510304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:26,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422435266] [2021-06-05 06:26:26,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:26,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:26:26,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:26,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:26:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:27,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:27,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:27,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:26:27,137 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:27,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:27,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:27,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:26:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:27,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422435266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:27,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:27,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:26:27,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935836208] [2021-06-05 06:26:27,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:27,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:27,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:27,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:27,205 INFO L87 Difference]: Start difference. First operand 7963 states and 26995 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:28,559 INFO L93 Difference]: Finished difference Result 10270 states and 34453 transitions. [2021-06-05 06:26:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:26:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:28,575 INFO L225 Difference]: With dead ends: 10270 [2021-06-05 06:26:28,576 INFO L226 Difference]: Without dead ends: 10255 [2021-06-05 06:26:28,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1016.2ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:26:28,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2021-06-05 06:26:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 7960. [2021-06-05 06:26:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7960 states, 7959 states have (on average 3.390124387485865) internal successors, (26982), 7959 states have internal predecessors, (26982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7960 states to 7960 states and 26982 transitions. [2021-06-05 06:26:28,742 INFO L78 Accepts]: Start accepts. Automaton has 7960 states and 26982 transitions. Word has length 30 [2021-06-05 06:26:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:28,742 INFO L482 AbstractCegarLoop]: Abstraction has 7960 states and 26982 transitions. [2021-06-05 06:26:28,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7960 states and 26982 transitions. [2021-06-05 06:26:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:28,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:28,751 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:28,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 06:26:28,953 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 544914058, now seen corresponding path program 156 times [2021-06-05 06:26:28,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:28,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688753128] [2021-06-05 06:26:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:29,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:29,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688753128] [2021-06-05 06:26:29,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688753128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:29,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903944290] [2021-06-05 06:26:29,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:29,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:26:29,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:26:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:29,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:29,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:29,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:26:29,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:29,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:29,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:29,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:26:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:29,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903944290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:29,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:29,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:26:29,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695455031] [2021-06-05 06:26:29,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:29,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:29,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:29,593 INFO L87 Difference]: Start difference. First operand 7960 states and 26982 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:30,233 INFO L93 Difference]: Finished difference Result 9564 states and 32107 transitions. [2021-06-05 06:26:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:26:30,233 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:30,248 INFO L225 Difference]: With dead ends: 9564 [2021-06-05 06:26:30,249 INFO L226 Difference]: Without dead ends: 9549 [2021-06-05 06:26:30,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:26:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2021-06-05 06:26:30,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 7963. [2021-06-05 06:26:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.3903541823662398) internal successors, (26994), 7962 states have internal predecessors, (26994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 26994 transitions. [2021-06-05 06:26:30,366 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 26994 transitions. Word has length 30 [2021-06-05 06:26:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:30,366 INFO L482 AbstractCegarLoop]: Abstraction has 7963 states and 26994 transitions. [2021-06-05 06:26:30,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:30,366 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 26994 transitions. [2021-06-05 06:26:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:30,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:30,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:30,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:30,576 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:30,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1866014684, now seen corresponding path program 157 times [2021-06-05 06:26:30,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:30,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048387513] [2021-06-05 06:26:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:30,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:30,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048387513] [2021-06-05 06:26:30,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048387513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:30,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569128617] [2021-06-05 06:26:30,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:26:30,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:31,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:31,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:26:31,115 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:31,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:31,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:31,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:26:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:31,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569128617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:31,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:31,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:26:31,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16184341] [2021-06-05 06:26:31,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:31,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:31,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:31,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:31,175 INFO L87 Difference]: Start difference. First operand 7963 states and 26994 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:32,001 INFO L93 Difference]: Finished difference Result 10118 states and 33877 transitions. [2021-06-05 06:26:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:26:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:32,018 INFO L225 Difference]: With dead ends: 10118 [2021-06-05 06:26:32,018 INFO L226 Difference]: Without dead ends: 10099 [2021-06-05 06:26:32,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 665.2ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:26:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10099 states. [2021-06-05 06:26:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10099 to 7959. [2021-06-05 06:26:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 3.3901734104046244) internal successors, (26979), 7958 states have internal predecessors, (26979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 26979 transitions. [2021-06-05 06:26:32,152 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 26979 transitions. Word has length 30 [2021-06-05 06:26:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:32,152 INFO L482 AbstractCegarLoop]: Abstraction has 7959 states and 26979 transitions. [2021-06-05 06:26:32,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 26979 transitions. [2021-06-05 06:26:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:32,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:32,162 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:32,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-05 06:26:32,362 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:32,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:32,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1199797958, now seen corresponding path program 158 times [2021-06-05 06:26:32,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:32,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544533348] [2021-06-05 06:26:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:32,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:32,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544533348] [2021-06-05 06:26:32,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544533348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:32,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689899056] [2021-06-05 06:26:32,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:32,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:26:32,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:26:32,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:32,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:32,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:26:32,914 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:32,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:32,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:32,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:26:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:32,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689899056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:32,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:32,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:26:32,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615517043] [2021-06-05 06:26:32,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:26:32,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:33,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:26:33,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:26:33,000 INFO L87 Difference]: Start difference. First operand 7959 states and 26979 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:34,218 INFO L93 Difference]: Finished difference Result 10150 states and 33983 transitions. [2021-06-05 06:26:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:26:34,218 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:34,234 INFO L225 Difference]: With dead ends: 10150 [2021-06-05 06:26:34,234 INFO L226 Difference]: Without dead ends: 10112 [2021-06-05 06:26:34,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 810.1ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:26:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10112 states. [2021-06-05 06:26:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10112 to 7955. [2021-06-05 06:26:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7955 states, 7954 states have (on average 3.3902439024390243) internal successors, (26966), 7954 states have internal predecessors, (26966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7955 states to 7955 states and 26966 transitions. [2021-06-05 06:26:34,360 INFO L78 Accepts]: Start accepts. Automaton has 7955 states and 26966 transitions. Word has length 30 [2021-06-05 06:26:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:34,360 INFO L482 AbstractCegarLoop]: Abstraction has 7955 states and 26966 transitions. [2021-06-05 06:26:34,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 7955 states and 26966 transitions. [2021-06-05 06:26:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:34,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:34,371 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:34,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:34,571 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1608720174, now seen corresponding path program 159 times [2021-06-05 06:26:34,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:34,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869021069] [2021-06-05 06:26:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:34,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:34,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869021069] [2021-06-05 06:26:34,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869021069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:34,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263156217] [2021-06-05 06:26:34,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:34,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:26:34,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:34,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:26:34,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:35,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:35,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:35,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:26:35,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:35,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:35,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:35,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:26:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:35,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263156217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:35,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:35,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:26:35,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265593782] [2021-06-05 06:26:35,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:35,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:35,117 INFO L87 Difference]: Start difference. First operand 7955 states and 26966 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:35,780 INFO L93 Difference]: Finished difference Result 9643 states and 32337 transitions. [2021-06-05 06:26:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:26:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:35,797 INFO L225 Difference]: With dead ends: 9643 [2021-06-05 06:26:35,797 INFO L226 Difference]: Without dead ends: 9622 [2021-06-05 06:26:35,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 580.3ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:26:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2021-06-05 06:26:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 7963. [2021-06-05 06:26:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.3904797789500125) internal successors, (26995), 7962 states have internal predecessors, (26995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 26995 transitions. [2021-06-05 06:26:35,922 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 26995 transitions. Word has length 30 [2021-06-05 06:26:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:35,922 INFO L482 AbstractCegarLoop]: Abstraction has 7963 states and 26995 transitions. [2021-06-05 06:26:35,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 26995 transitions. [2021-06-05 06:26:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:35,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:35,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:36,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:36,133 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 164387662, now seen corresponding path program 160 times [2021-06-05 06:26:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:36,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17726912] [2021-06-05 06:26:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:36,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:36,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17726912] [2021-06-05 06:26:36,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17726912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:36,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500075423] [2021-06-05 06:26:36,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:36,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:26:36,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:36,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:26:36,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:36,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:36,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:26:36,663 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:36,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:36,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:36,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 06:26:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:36,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500075423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:36,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:36,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:26:36,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213052734] [2021-06-05 06:26:36,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:36,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:36,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:36,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:36,722 INFO L87 Difference]: Start difference. First operand 7963 states and 26995 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:37,588 INFO L93 Difference]: Finished difference Result 10548 states and 35223 transitions. [2021-06-05 06:26:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:26:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:37,606 INFO L225 Difference]: With dead ends: 10548 [2021-06-05 06:26:37,606 INFO L226 Difference]: Without dead ends: 10498 [2021-06-05 06:26:37,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 676.1ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:26:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10498 states. [2021-06-05 06:26:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10498 to 7965. [2021-06-05 06:26:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 3.3906328478151684) internal successors, (27003), 7964 states have internal predecessors, (27003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 27003 transitions. [2021-06-05 06:26:37,750 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 27003 transitions. Word has length 30 [2021-06-05 06:26:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:37,750 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 27003 transitions. [2021-06-05 06:26:37,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 27003 transitions. [2021-06-05 06:26:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:37,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:37,761 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:37,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:37,965 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1462747246, now seen corresponding path program 161 times [2021-06-05 06:26:37,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:37,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140880016] [2021-06-05 06:26:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:38,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:38,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140880016] [2021-06-05 06:26:38,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140880016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:38,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265615332] [2021-06-05 06:26:38,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:38,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:26:38,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:38,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:26:38,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:38,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:38,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:38,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:38,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:26:38,471 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:38,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:38,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:38,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:26:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:38,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265615332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:38,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:38,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:26:38,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438063385] [2021-06-05 06:26:38,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:26:38,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:38,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:26:38,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:26:38,570 INFO L87 Difference]: Start difference. First operand 7965 states and 27003 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:39,042 INFO L93 Difference]: Finished difference Result 10054 states and 33695 transitions. [2021-06-05 06:26:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:26:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:39,058 INFO L225 Difference]: With dead ends: 10054 [2021-06-05 06:26:39,058 INFO L226 Difference]: Without dead ends: 10030 [2021-06-05 06:26:39,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 597.6ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:26:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-06-05 06:26:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 7959. [2021-06-05 06:26:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 3.390424729831616) internal successors, (26981), 7958 states have internal predecessors, (26981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 26981 transitions. [2021-06-05 06:26:39,184 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 26981 transitions. Word has length 30 [2021-06-05 06:26:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:39,184 INFO L482 AbstractCegarLoop]: Abstraction has 7959 states and 26981 transitions. [2021-06-05 06:26:39,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 26981 transitions. [2021-06-05 06:26:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:39,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:39,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:39,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 06:26:39,395 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash -135761518, now seen corresponding path program 162 times [2021-06-05 06:26:39,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:39,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237713558] [2021-06-05 06:26:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:39,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:39,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237713558] [2021-06-05 06:26:39,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237713558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:39,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200491827] [2021-06-05 06:26:39,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:39,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:26:39,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:26:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:40,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:40,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:40,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:26:40,140 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:40,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:40,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:40,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:26:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:40,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200491827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:40,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:40,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 06:26:40,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207834487] [2021-06-05 06:26:40,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:26:40,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:40,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:26:40,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:26:40,205 INFO L87 Difference]: Start difference. First operand 7959 states and 26981 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:41,874 INFO L93 Difference]: Finished difference Result 10875 states and 36072 transitions. [2021-06-05 06:26:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:26:41,874 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:41,891 INFO L225 Difference]: With dead ends: 10875 [2021-06-05 06:26:41,892 INFO L226 Difference]: Without dead ends: 10799 [2021-06-05 06:26:41,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1356.9ms TimeCoverageRelationStatistics Valid=339, Invalid=1823, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:26:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10799 states. [2021-06-05 06:26:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10799 to 7945. [2021-06-05 06:26:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7945 states, 7944 states have (on average 3.3908610271903323) internal successors, (26937), 7944 states have internal predecessors, (26937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7945 states to 7945 states and 26937 transitions. [2021-06-05 06:26:42,027 INFO L78 Accepts]: Start accepts. Automaton has 7945 states and 26937 transitions. Word has length 30 [2021-06-05 06:26:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:42,027 INFO L482 AbstractCegarLoop]: Abstraction has 7945 states and 26937 transitions. [2021-06-05 06:26:42,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7945 states and 26937 transitions. [2021-06-05 06:26:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:42,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:42,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:42,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 06:26:42,237 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1439356142, now seen corresponding path program 163 times [2021-06-05 06:26:42,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:42,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868533697] [2021-06-05 06:26:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:42,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:42,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868533697] [2021-06-05 06:26:42,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868533697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:42,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786281921] [2021-06-05 06:26:42,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:26:42,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:42,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:42,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:42,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:42,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:26:42,768 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:42,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:42,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:42,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:26:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:42,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786281921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:42,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:42,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:26:42,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321098653] [2021-06-05 06:26:42,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:26:42,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:42,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:26:42,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:26:42,856 INFO L87 Difference]: Start difference. First operand 7945 states and 26937 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:43,741 INFO L93 Difference]: Finished difference Result 10446 states and 34982 transitions. [2021-06-05 06:26:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:26:43,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:43,757 INFO L225 Difference]: With dead ends: 10446 [2021-06-05 06:26:43,757 INFO L226 Difference]: Without dead ends: 10399 [2021-06-05 06:26:43,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:26:43,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10399 states. [2021-06-05 06:26:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10399 to 7943. [2021-06-05 06:26:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7943 states, 7942 states have (on average 3.390833543188114) internal successors, (26930), 7942 states have internal predecessors, (26930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7943 states to 7943 states and 26930 transitions. [2021-06-05 06:26:43,886 INFO L78 Accepts]: Start accepts. Automaton has 7943 states and 26930 transitions. Word has length 30 [2021-06-05 06:26:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:43,887 INFO L482 AbstractCegarLoop]: Abstraction has 7943 states and 26930 transitions. [2021-06-05 06:26:43,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7943 states and 26930 transitions. [2021-06-05 06:26:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:43,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:43,897 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:44,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:44,098 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1525251902, now seen corresponding path program 164 times [2021-06-05 06:26:44,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:44,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630970697] [2021-06-05 06:26:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:44,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:44,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630970697] [2021-06-05 06:26:44,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630970697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:44,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200529576] [2021-06-05 06:26:44,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:44,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:26:44,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:44,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:26:44,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:44,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:44,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:44,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 06:26:44,519 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:44,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:44,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:44,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 06:26:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:44,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200529576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:44,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:44,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:26:44,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126105546] [2021-06-05 06:26:44,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:44,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:44,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:44,606 INFO L87 Difference]: Start difference. First operand 7943 states and 26930 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:46,214 INFO L93 Difference]: Finished difference Result 10822 states and 36180 transitions. [2021-06-05 06:26:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:26:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:46,232 INFO L225 Difference]: With dead ends: 10822 [2021-06-05 06:26:46,232 INFO L226 Difference]: Without dead ends: 10743 [2021-06-05 06:26:46,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1158.6ms TimeCoverageRelationStatistics Valid=331, Invalid=1831, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:26:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10743 states. [2021-06-05 06:26:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10743 to 7935. [2021-06-05 06:26:46,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7935 states, 7934 states have (on average 3.3909755482732544) internal successors, (26904), 7934 states have internal predecessors, (26904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7935 states to 7935 states and 26904 transitions. [2021-06-05 06:26:46,367 INFO L78 Accepts]: Start accepts. Automaton has 7935 states and 26904 transitions. Word has length 30 [2021-06-05 06:26:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:46,367 INFO L482 AbstractCegarLoop]: Abstraction has 7935 states and 26904 transitions. [2021-06-05 06:26:46,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7935 states and 26904 transitions. [2021-06-05 06:26:46,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:46,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:46,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:46,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-05 06:26:46,578 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash -981108774, now seen corresponding path program 165 times [2021-06-05 06:26:46,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:46,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339952133] [2021-06-05 06:26:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:46,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:46,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339952133] [2021-06-05 06:26:46,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339952133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:46,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868484821] [2021-06-05 06:26:46,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:46,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:26:46,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:46,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:26:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:47,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:47,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:47,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:26:47,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:47,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:47,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:47,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-06-05 06:26:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:47,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868484821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:47,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:47,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:26:47,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668225565] [2021-06-05 06:26:47,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:47,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:47,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:47,215 INFO L87 Difference]: Start difference. First operand 7935 states and 26904 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:48,932 INFO L93 Difference]: Finished difference Result 10299 states and 34227 transitions. [2021-06-05 06:26:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:26:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:48,948 INFO L225 Difference]: With dead ends: 10299 [2021-06-05 06:26:48,949 INFO L226 Difference]: Without dead ends: 10284 [2021-06-05 06:26:48,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1387.8ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:26:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10284 states. [2021-06-05 06:26:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10284 to 7977. [2021-06-05 06:26:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 3.3929287863590774) internal successors, (27062), 7976 states have internal predecessors, (27062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 27062 transitions. [2021-06-05 06:26:49,110 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 27062 transitions. Word has length 30 [2021-06-05 06:26:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:49,110 INFO L482 AbstractCegarLoop]: Abstraction has 7977 states and 27062 transitions. [2021-06-05 06:26:49,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 27062 transitions. [2021-06-05 06:26:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:49,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:49,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:49,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-05 06:26:49,320 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1752384559, now seen corresponding path program 60 times [2021-06-05 06:26:49,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:49,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364926796] [2021-06-05 06:26:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:49,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:49,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364926796] [2021-06-05 06:26:49,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364926796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:49,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434705449] [2021-06-05 06:26:49,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:49,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:26:49,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:49,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:26:49,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:49,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:49,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:49,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:26:49,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:49,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:49,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:49,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:26:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:49,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434705449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:49,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:49,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 06:26:49,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604951735] [2021-06-05 06:26:49,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:26:49,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:49,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:26:49,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:26:49,816 INFO L87 Difference]: Start difference. First operand 7977 states and 27062 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:51,824 INFO L93 Difference]: Finished difference Result 10297 states and 33629 transitions. [2021-06-05 06:26:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:26:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:51,841 INFO L225 Difference]: With dead ends: 10297 [2021-06-05 06:26:51,841 INFO L226 Difference]: Without dead ends: 10260 [2021-06-05 06:26:51,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1369.1ms TimeCoverageRelationStatistics Valid=505, Invalid=2575, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:26:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2021-06-05 06:26:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 8070. [2021-06-05 06:26:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8070 states, 8069 states have (on average 3.390878671458669) internal successors, (27361), 8069 states have internal predecessors, (27361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8070 states to 8070 states and 27361 transitions. [2021-06-05 06:26:51,981 INFO L78 Accepts]: Start accepts. Automaton has 8070 states and 27361 transitions. Word has length 30 [2021-06-05 06:26:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:51,981 INFO L482 AbstractCegarLoop]: Abstraction has 8070 states and 27361 transitions. [2021-06-05 06:26:51,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 8070 states and 27361 transitions. [2021-06-05 06:26:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:51,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:51,992 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:52,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 06:26:52,192 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:52,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1620264598, now seen corresponding path program 166 times [2021-06-05 06:26:52,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:52,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877159674] [2021-06-05 06:26:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:52,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:52,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877159674] [2021-06-05 06:26:52,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877159674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:52,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984091344] [2021-06-05 06:26:52,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:52,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:26:52,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:26:52,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:52,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:52,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:26:52,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:52,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:52,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:52,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:26:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:52,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984091344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:52,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:52,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:26:52,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523676064] [2021-06-05 06:26:52,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:26:52,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:52,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:26:52,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:26:52,801 INFO L87 Difference]: Start difference. First operand 8070 states and 27361 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:54,946 INFO L93 Difference]: Finished difference Result 10574 states and 35082 transitions. [2021-06-05 06:26:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:26:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:54,964 INFO L225 Difference]: With dead ends: 10574 [2021-06-05 06:26:54,964 INFO L226 Difference]: Without dead ends: 10559 [2021-06-05 06:26:54,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1657.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1998, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:26:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-06-05 06:26:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 8087. [2021-06-05 06:26:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8087 states, 8086 states have (on average 3.391540934949295) internal successors, (27424), 8086 states have internal predecessors, (27424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8087 states to 8087 states and 27424 transitions. [2021-06-05 06:26:55,100 INFO L78 Accepts]: Start accepts. Automaton has 8087 states and 27424 transitions. Word has length 30 [2021-06-05 06:26:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:55,100 INFO L482 AbstractCegarLoop]: Abstraction has 8087 states and 27424 transitions. [2021-06-05 06:26:55,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8087 states and 27424 transitions. [2021-06-05 06:26:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:55,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:55,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:55,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-06-05 06:26:55,311 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:55,311 INFO L82 PathProgramCache]: Analyzing trace with hash -869154562, now seen corresponding path program 167 times [2021-06-05 06:26:55,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:55,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021551883] [2021-06-05 06:26:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:55,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:55,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021551883] [2021-06-05 06:26:55,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021551883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:55,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531846399] [2021-06-05 06:26:55,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:55,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:26:55,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:55,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:26:55,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:55,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:55,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:55,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:26:55,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:55,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:55,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:55,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2021-06-05 06:26:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:55,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531846399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:55,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:55,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 06:26:55,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008555950] [2021-06-05 06:26:55,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:26:55,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:55,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:26:55,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:26:55,904 INFO L87 Difference]: Start difference. First operand 8087 states and 27424 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:58,411 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 06:26:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:58,805 INFO L93 Difference]: Finished difference Result 11276 states and 37373 transitions. [2021-06-05 06:26:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:26:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:26:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:58,824 INFO L225 Difference]: With dead ends: 11276 [2021-06-05 06:26:58,824 INFO L226 Difference]: Without dead ends: 11257 [2021-06-05 06:26:58,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2258.1ms TimeCoverageRelationStatistics Valid=429, Invalid=2327, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:26:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2021-06-05 06:26:58,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 8075. [2021-06-05 06:26:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8075 states, 8074 states have (on average 3.390760465692346) internal successors, (27377), 8074 states have internal predecessors, (27377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8075 states to 8075 states and 27377 transitions. [2021-06-05 06:26:58,973 INFO L78 Accepts]: Start accepts. Automaton has 8075 states and 27377 transitions. Word has length 30 [2021-06-05 06:26:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:58,974 INFO L482 AbstractCegarLoop]: Abstraction has 8075 states and 27377 transitions. [2021-06-05 06:26:58,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 8075 states and 27377 transitions. [2021-06-05 06:26:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:26:58,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:58,984 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:59,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:59,185 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:59,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1957533521, now seen corresponding path program 61 times [2021-06-05 06:26:59,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:59,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808517513] [2021-06-05 06:26:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:59,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:59,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808517513] [2021-06-05 06:26:59,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808517513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:59,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488432728] [2021-06-05 06:26:59,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:59,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:26:59,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:59,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:59,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:59,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:59,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:59,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:26:59,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:59,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:59,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:26:59,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:26:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:59,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488432728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:59,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:59,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 06:26:59,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108652555] [2021-06-05 06:26:59,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:26:59,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:59,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:26:59,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:26:59,668 INFO L87 Difference]: Start difference. First operand 8075 states and 27377 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:01,138 INFO L93 Difference]: Finished difference Result 10786 states and 35782 transitions. [2021-06-05 06:27:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:27:01,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:01,157 INFO L225 Difference]: With dead ends: 10786 [2021-06-05 06:27:01,157 INFO L226 Difference]: Without dead ends: 10771 [2021-06-05 06:27:01,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1077.3ms TimeCoverageRelationStatistics Valid=385, Invalid=2065, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:27:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10771 states. [2021-06-05 06:27:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 8078. [2021-06-05 06:27:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8078 states, 8077 states have (on average 3.391234369196484) internal successors, (27391), 8077 states have internal predecessors, (27391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8078 states to 8078 states and 27391 transitions. [2021-06-05 06:27:01,300 INFO L78 Accepts]: Start accepts. Automaton has 8078 states and 27391 transitions. Word has length 30 [2021-06-05 06:27:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:01,301 INFO L482 AbstractCegarLoop]: Abstraction has 8078 states and 27391 transitions. [2021-06-05 06:27:01,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 8078 states and 27391 transitions. [2021-06-05 06:27:01,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:01,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:01,311 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:01,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:01,511 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:01,511 INFO L82 PathProgramCache]: Analyzing trace with hash -564325939, now seen corresponding path program 62 times [2021-06-05 06:27:01,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:01,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055930938] [2021-06-05 06:27:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:01,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:01,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055930938] [2021-06-05 06:27:01,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055930938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:01,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942073822] [2021-06-05 06:27:01,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:01,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:01,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:27:01,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:02,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:02,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:02,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 06:27:02,116 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:27:02,132 INFO L628 ElimStorePlain]: treesize reduction 15, result has 50.0 percent of original size [2021-06-05 06:27:02,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:02,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-05 06:27:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:02,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942073822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:02,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:02,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 06:27:02,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488958297] [2021-06-05 06:27:02,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:27:02,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:02,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:27:02,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:27:02,187 INFO L87 Difference]: Start difference. First operand 8078 states and 27391 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:05,556 INFO L93 Difference]: Finished difference Result 12179 states and 39889 transitions. [2021-06-05 06:27:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:27:05,557 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:05,577 INFO L225 Difference]: With dead ends: 12179 [2021-06-05 06:27:05,577 INFO L226 Difference]: Without dead ends: 12116 [2021-06-05 06:27:05,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 2637.8ms TimeCoverageRelationStatistics Valid=1066, Invalid=4786, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:27:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12116 states. [2021-06-05 06:27:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12116 to 8079. [2021-06-05 06:27:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8079 states, 8078 states have (on average 3.391804902203516) internal successors, (27399), 8078 states have internal predecessors, (27399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 27399 transitions. [2021-06-05 06:27:05,744 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 27399 transitions. Word has length 30 [2021-06-05 06:27:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:05,745 INFO L482 AbstractCegarLoop]: Abstraction has 8079 states and 27399 transitions. [2021-06-05 06:27:05,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:05,745 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 27399 transitions. [2021-06-05 06:27:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:05,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:05,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:05,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:05,955 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:05,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:05,956 INFO L82 PathProgramCache]: Analyzing trace with hash 507489018, now seen corresponding path program 168 times [2021-06-05 06:27:05,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:05,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674119833] [2021-06-05 06:27:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:06,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:06,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674119833] [2021-06-05 06:27:06,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674119833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:06,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71738972] [2021-06-05 06:27:06,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:06,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:27:06,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:06,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:27:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:06,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:06,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:06,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:27:06,438 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:06,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:06,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:06,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:27:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:06,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71738972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:06,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:06,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:27:06,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233708978] [2021-06-05 06:27:06,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:27:06,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:06,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:27:06,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:27:06,543 INFO L87 Difference]: Start difference. First operand 8079 states and 27399 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:09,359 INFO L93 Difference]: Finished difference Result 10940 states and 36521 transitions. [2021-06-05 06:27:09,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:27:09,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:09,378 INFO L225 Difference]: With dead ends: 10940 [2021-06-05 06:27:09,378 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 06:27:09,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2115.7ms TimeCoverageRelationStatistics Valid=436, Invalid=2986, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:27:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 06:27:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 8061. [2021-06-05 06:27:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8061 states, 8060 states have (on average 3.390818858560794) internal successors, (27330), 8060 states have internal predecessors, (27330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8061 states to 8061 states and 27330 transitions. [2021-06-05 06:27:09,518 INFO L78 Accepts]: Start accepts. Automaton has 8061 states and 27330 transitions. Word has length 30 [2021-06-05 06:27:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:09,518 INFO L482 AbstractCegarLoop]: Abstraction has 8061 states and 27330 transitions. [2021-06-05 06:27:09,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8061 states and 27330 transitions. [2021-06-05 06:27:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:09,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:09,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:09,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 06:27:09,729 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:09,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1874084370, now seen corresponding path program 169 times [2021-06-05 06:27:09,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:09,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281803910] [2021-06-05 06:27:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:10,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:10,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281803910] [2021-06-05 06:27:10,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281803910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:10,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541057347] [2021-06-05 06:27:10,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:10,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:27:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:10,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:10,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 06:27:10,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:10,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:10,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 06:27:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:10,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541057347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:10,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:10,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:27:10,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39340912] [2021-06-05 06:27:10,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:27:10,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:27:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:27:10,463 INFO L87 Difference]: Start difference. First operand 8061 states and 27330 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:11,757 INFO L93 Difference]: Finished difference Result 9845 states and 32988 transitions. [2021-06-05 06:27:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:27:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:11,772 INFO L225 Difference]: With dead ends: 9845 [2021-06-05 06:27:11,772 INFO L226 Difference]: Without dead ends: 9830 [2021-06-05 06:27:11,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1133.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:27:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9830 states. [2021-06-05 06:27:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9830 to 8102. [2021-06-05 06:27:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8102 states, 8101 states have (on average 3.3900752993457597) internal successors, (27463), 8101 states have internal predecessors, (27463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8102 states to 8102 states and 27463 transitions. [2021-06-05 06:27:11,940 INFO L78 Accepts]: Start accepts. Automaton has 8102 states and 27463 transitions. Word has length 30 [2021-06-05 06:27:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:11,940 INFO L482 AbstractCegarLoop]: Abstraction has 8102 states and 27463 transitions. [2021-06-05 06:27:11,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 8102 states and 27463 transitions. [2021-06-05 06:27:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:11,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:11,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:12,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable689,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:12,150 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:12,151 INFO L82 PathProgramCache]: Analyzing trace with hash -615334790, now seen corresponding path program 170 times [2021-06-05 06:27:12,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:12,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388057617] [2021-06-05 06:27:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:12,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:12,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388057617] [2021-06-05 06:27:12,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388057617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:12,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83094894] [2021-06-05 06:27:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:12,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:12,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:12,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:27:12,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:12,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:12,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 06:27:12,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:12,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:12,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:12,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:125 [2021-06-05 06:27:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:12,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83094894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:12,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:12,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 06:27:12,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725805171] [2021-06-05 06:27:12,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:27:12,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:12,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:27:12,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:27:12,961 INFO L87 Difference]: Start difference. First operand 8102 states and 27463 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:18,359 INFO L93 Difference]: Finished difference Result 11445 states and 37796 transitions. [2021-06-05 06:27:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:27:18,359 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:18,378 INFO L225 Difference]: With dead ends: 11445 [2021-06-05 06:27:18,378 INFO L226 Difference]: Without dead ends: 11407 [2021-06-05 06:27:18,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 3795.3ms TimeCoverageRelationStatistics Valid=589, Invalid=4813, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:27:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11407 states. [2021-06-05 06:27:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11407 to 8125. [2021-06-05 06:27:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8125 states, 8124 states have (on average 3.3915558838010833) internal successors, (27553), 8124 states have internal predecessors, (27553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8125 states to 8125 states and 27553 transitions. [2021-06-05 06:27:18,528 INFO L78 Accepts]: Start accepts. Automaton has 8125 states and 27553 transitions. Word has length 30 [2021-06-05 06:27:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:18,528 INFO L482 AbstractCegarLoop]: Abstraction has 8125 states and 27553 transitions. [2021-06-05 06:27:18,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8125 states and 27553 transitions. [2021-06-05 06:27:18,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:18,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:18,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:18,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:18,739 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:18,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1445702312, now seen corresponding path program 171 times [2021-06-05 06:27:18,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:18,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494547391] [2021-06-05 06:27:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:19,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:19,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494547391] [2021-06-05 06:27:19,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494547391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:19,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661986434] [2021-06-05 06:27:19,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:19,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:27:19,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:19,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:27:19,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:19,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:19,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:27:19,178 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:19,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:19,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:19,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:27:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:19,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661986434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:19,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:19,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:27:19,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725229458] [2021-06-05 06:27:19,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:27:19,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:19,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:27:19,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:27:19,272 INFO L87 Difference]: Start difference. First operand 8125 states and 27553 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:21,785 INFO L93 Difference]: Finished difference Result 10553 states and 35405 transitions. [2021-06-05 06:27:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:27:21,785 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:21,803 INFO L225 Difference]: With dead ends: 10553 [2021-06-05 06:27:21,803 INFO L226 Difference]: Without dead ends: 10522 [2021-06-05 06:27:21,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1694.4ms TimeCoverageRelationStatistics Valid=359, Invalid=2397, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:27:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10522 states. [2021-06-05 06:27:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10522 to 8089. [2021-06-05 06:27:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8089 states, 8088 states have (on average 3.3920623145400595) internal successors, (27435), 8088 states have internal predecessors, (27435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8089 states to 8089 states and 27435 transitions. [2021-06-05 06:27:21,983 INFO L78 Accepts]: Start accepts. Automaton has 8089 states and 27435 transitions. Word has length 30 [2021-06-05 06:27:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:21,983 INFO L482 AbstractCegarLoop]: Abstraction has 8089 states and 27435 transitions. [2021-06-05 06:27:21,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 8089 states and 27435 transitions. [2021-06-05 06:27:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:21,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:21,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:22,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 06:27:22,194 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash 223815934, now seen corresponding path program 172 times [2021-06-05 06:27:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:22,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025301351] [2021-06-05 06:27:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:22,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:22,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025301351] [2021-06-05 06:27:22,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025301351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:22,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909108484] [2021-06-05 06:27:22,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:22,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:27:22,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:22,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:27:22,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:22,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:22,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:22,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:22,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:22,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-06-05 06:27:22,723 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:22,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:22,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:22,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 06:27:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:22,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909108484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:22,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:22,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 06:27:22,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788357467] [2021-06-05 06:27:22,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:27:22,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:22,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:27:22,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:27:22,828 INFO L87 Difference]: Start difference. First operand 8089 states and 27435 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:24,374 INFO L93 Difference]: Finished difference Result 10459 states and 34983 transitions. [2021-06-05 06:27:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:27:24,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:24,391 INFO L225 Difference]: With dead ends: 10459 [2021-06-05 06:27:24,391 INFO L226 Difference]: Without dead ends: 10434 [2021-06-05 06:27:24,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1029.4ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:27:24,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10434 states. [2021-06-05 06:27:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10434 to 8097. [2021-06-05 06:27:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8097 states, 8096 states have (on average 3.3916749011857705) internal successors, (27459), 8096 states have internal predecessors, (27459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8097 states to 8097 states and 27459 transitions. [2021-06-05 06:27:24,524 INFO L78 Accepts]: Start accepts. Automaton has 8097 states and 27459 transitions. Word has length 30 [2021-06-05 06:27:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:24,524 INFO L482 AbstractCegarLoop]: Abstraction has 8097 states and 27459 transitions. [2021-06-05 06:27:24,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 8097 states and 27459 transitions. [2021-06-05 06:27:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:24,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:24,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:24,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-06-05 06:27:24,735 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1964246771, now seen corresponding path program 63 times [2021-06-05 06:27:24,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:24,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553290602] [2021-06-05 06:27:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:24,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:24,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553290602] [2021-06-05 06:27:24,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553290602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:24,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253480027] [2021-06-05 06:27:24,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:25,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:27:25,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:25,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:27:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:25,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:25,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:25,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:25,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 06:27:25,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:25,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:25,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:25,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 06:27:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:25,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253480027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:25,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:25,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 06:27:25,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451356126] [2021-06-05 06:27:25,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:27:25,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:25,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:27:25,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:27:25,272 INFO L87 Difference]: Start difference. First operand 8097 states and 27459 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:27,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:27,505 INFO L93 Difference]: Finished difference Result 10723 states and 35680 transitions. [2021-06-05 06:27:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:27:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:27,522 INFO L225 Difference]: With dead ends: 10723 [2021-06-05 06:27:27,523 INFO L226 Difference]: Without dead ends: 10679 [2021-06-05 06:27:27,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1658.9ms TimeCoverageRelationStatistics Valid=525, Invalid=3257, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:27:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10679 states. [2021-06-05 06:27:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10679 to 8115. [2021-06-05 06:27:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8115 states, 8114 states have (on average 3.3910525018486566) internal successors, (27515), 8114 states have internal predecessors, (27515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8115 states to 8115 states and 27515 transitions. [2021-06-05 06:27:27,673 INFO L78 Accepts]: Start accepts. Automaton has 8115 states and 27515 transitions. Word has length 30 [2021-06-05 06:27:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:27,673 INFO L482 AbstractCegarLoop]: Abstraction has 8115 states and 27515 transitions. [2021-06-05 06:27:27,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 8115 states and 27515 transitions. [2021-06-05 06:27:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:27,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:27,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:27,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable702 [2021-06-05 06:27:27,883 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:27,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1734614609, now seen corresponding path program 64 times [2021-06-05 06:27:27,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:27,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810580477] [2021-06-05 06:27:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:28,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:28,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810580477] [2021-06-05 06:27:28,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810580477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:28,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736073864] [2021-06-05 06:27:28,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:28,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:27:28,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:28,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:27:28,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:28,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:28,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:28,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:28,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:27:28,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:28,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:28,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:28,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:27:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:28,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736073864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:28,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:28,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 06:27:28,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159979764] [2021-06-05 06:27:28,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:27:28,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:28,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:27:28,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:27:28,532 INFO L87 Difference]: Start difference. First operand 8115 states and 27515 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:31,186 INFO L93 Difference]: Finished difference Result 10343 states and 34564 transitions. [2021-06-05 06:27:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:27:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:31,201 INFO L225 Difference]: With dead ends: 10343 [2021-06-05 06:27:31,201 INFO L226 Difference]: Without dead ends: 10313 [2021-06-05 06:27:31,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 2247.1ms TimeCoverageRelationStatistics Valid=660, Invalid=3246, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:27:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10313 states. [2021-06-05 06:27:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10313 to 8083. [2021-06-05 06:27:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8083 states, 8082 states have (on average 3.3926008413758972) internal successors, (27419), 8082 states have internal predecessors, (27419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8083 states to 8083 states and 27419 transitions. [2021-06-05 06:27:31,316 INFO L78 Accepts]: Start accepts. Automaton has 8083 states and 27419 transitions. Word has length 30 [2021-06-05 06:27:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:31,316 INFO L482 AbstractCegarLoop]: Abstraction has 8083 states and 27419 transitions. [2021-06-05 06:27:31,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 8083 states and 27419 transitions. [2021-06-05 06:27:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:31,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:31,326 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:31,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:31,526 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:31,526 INFO L82 PathProgramCache]: Analyzing trace with hash 938812873, now seen corresponding path program 65 times [2021-06-05 06:27:31,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:31,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42340502] [2021-06-05 06:27:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:31,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:31,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42340502] [2021-06-05 06:27:31,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42340502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:31,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286881229] [2021-06-05 06:27:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:31,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:27:31,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:31,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:27:31,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:31,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:31,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:31,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:31,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 06:27:32,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:27:32,034 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-06-05 06:27:32,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:32,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-06-05 06:27:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:32,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286881229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:32,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:32,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 06:27:32,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203434253] [2021-06-05 06:27:32,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:27:32,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:32,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:27:32,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:27:32,116 INFO L87 Difference]: Start difference. First operand 8083 states and 27419 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:33,868 INFO L93 Difference]: Finished difference Result 10221 states and 34168 transitions. [2021-06-05 06:27:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:27:33,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:33,884 INFO L225 Difference]: With dead ends: 10221 [2021-06-05 06:27:33,884 INFO L226 Difference]: Without dead ends: 10160 [2021-06-05 06:27:33,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1267.6ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:27:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10160 states. [2021-06-05 06:27:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10160 to 8114. [2021-06-05 06:27:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8114 states, 8113 states have (on average 3.3919635153457413) internal successors, (27519), 8113 states have internal predecessors, (27519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8114 states to 8114 states and 27519 transitions. [2021-06-05 06:27:34,013 INFO L78 Accepts]: Start accepts. Automaton has 8114 states and 27519 transitions. Word has length 30 [2021-06-05 06:27:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:34,013 INFO L482 AbstractCegarLoop]: Abstraction has 8114 states and 27519 transitions. [2021-06-05 06:27:34,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8114 states and 27519 transitions. [2021-06-05 06:27:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:34,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:34,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:34,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:34,223 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:34,224 INFO L82 PathProgramCache]: Analyzing trace with hash 59086430, now seen corresponding path program 173 times [2021-06-05 06:27:34,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:34,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493289636] [2021-06-05 06:27:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:34,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:34,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493289636] [2021-06-05 06:27:34,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493289636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:34,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489849722] [2021-06-05 06:27:34,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:34,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:27:34,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:27:34,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:34,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:34,794 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:27:34,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 56 [2021-06-05 06:27:34,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:34,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:34,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:34,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:3 [2021-06-05 06:27:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:34,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489849722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:34,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:34,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:27:34,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972418327] [2021-06-05 06:27:34,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:27:34,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:34,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:27:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:27:34,824 INFO L87 Difference]: Start difference. First operand 8114 states and 27519 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:36,001 INFO L93 Difference]: Finished difference Result 9765 states and 32825 transitions. [2021-06-05 06:27:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:27:36,001 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:36,017 INFO L225 Difference]: With dead ends: 9765 [2021-06-05 06:27:36,018 INFO L226 Difference]: Without dead ends: 9743 [2021-06-05 06:27:36,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 725.7ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:27:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9743 states. [2021-06-05 06:27:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9743 to 8139. [2021-06-05 06:27:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8139 states, 8138 states have (on average 3.391250921602359) internal successors, (27598), 8138 states have internal predecessors, (27598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8139 states to 8139 states and 27598 transitions. [2021-06-05 06:27:36,138 INFO L78 Accepts]: Start accepts. Automaton has 8139 states and 27598 transitions. Word has length 30 [2021-06-05 06:27:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:36,138 INFO L482 AbstractCegarLoop]: Abstraction has 8139 states and 27598 transitions. [2021-06-05 06:27:36,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 8139 states and 27598 transitions. [2021-06-05 06:27:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:36,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:36,149 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:36,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable715 [2021-06-05 06:27:36,349 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1864634566, now seen corresponding path program 174 times [2021-06-05 06:27:36,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:36,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705005234] [2021-06-05 06:27:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:36,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:36,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705005234] [2021-06-05 06:27:36,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705005234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:36,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763746809] [2021-06-05 06:27:36,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:36,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:27:36,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:36,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:27:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:36,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:36,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:36,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:27:36,755 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:36,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:36,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:36,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 06:27:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:36,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763746809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:36,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:36,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 06:27:36,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638120493] [2021-06-05 06:27:36,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:27:36,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:36,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:27:36,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:27:36,837 INFO L87 Difference]: Start difference. First operand 8139 states and 27598 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:38,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:38,551 INFO L93 Difference]: Finished difference Result 10833 states and 36295 transitions. [2021-06-05 06:27:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:27:38,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:38,569 INFO L225 Difference]: With dead ends: 10833 [2021-06-05 06:27:38,570 INFO L226 Difference]: Without dead ends: 10798 [2021-06-05 06:27:38,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1333.2ms TimeCoverageRelationStatistics Valid=388, Invalid=2474, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:27:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10798 states. [2021-06-05 06:27:38,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10798 to 8097. [2021-06-05 06:27:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8097 states, 8096 states have (on average 3.390069169960474) internal successors, (27446), 8096 states have internal predecessors, (27446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8097 states to 8097 states and 27446 transitions. [2021-06-05 06:27:38,715 INFO L78 Accepts]: Start accepts. Automaton has 8097 states and 27446 transitions. Word has length 30 [2021-06-05 06:27:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:38,715 INFO L482 AbstractCegarLoop]: Abstraction has 8097 states and 27446 transitions. [2021-06-05 06:27:38,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 8097 states and 27446 transitions. [2021-06-05 06:27:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:38,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:38,725 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:38,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:38,926 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1397281338, now seen corresponding path program 175 times [2021-06-05 06:27:38,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:38,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479279815] [2021-06-05 06:27:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:39,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479279815] [2021-06-05 06:27:39,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479279815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926919354] [2021-06-05 06:27:39,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:39,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:27:39,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:39,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:39,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 06:27:39,430 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:39,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:39,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:39,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-06-05 06:27:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:39,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926919354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:39,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:39,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:27:39,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150675271] [2021-06-05 06:27:39,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:27:39,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:39,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:27:39,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:27:39,525 INFO L87 Difference]: Start difference. First operand 8097 states and 27446 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:40,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:40,531 INFO L93 Difference]: Finished difference Result 10406 states and 34864 transitions. [2021-06-05 06:27:40,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:27:40,531 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:40,547 INFO L225 Difference]: With dead ends: 10406 [2021-06-05 06:27:40,547 INFO L226 Difference]: Without dead ends: 10371 [2021-06-05 06:27:40,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 741.2ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:27:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10371 states. [2021-06-05 06:27:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10371 to 8092. [2021-06-05 06:27:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8092 states, 8091 states have (on average 3.389445062415029) internal successors, (27424), 8091 states have internal predecessors, (27424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:40,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8092 states to 8092 states and 27424 transitions. [2021-06-05 06:27:40,675 INFO L78 Accepts]: Start accepts. Automaton has 8092 states and 27424 transitions. Word has length 30 [2021-06-05 06:27:40,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:40,675 INFO L482 AbstractCegarLoop]: Abstraction has 8092 states and 27424 transitions. [2021-06-05 06:27:40,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 8092 states and 27424 transitions. [2021-06-05 06:27:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:40,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:40,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:40,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:40,886 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:40,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1102615804, now seen corresponding path program 176 times [2021-06-05 06:27:40,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:40,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886320127] [2021-06-05 06:27:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:41,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:41,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886320127] [2021-06-05 06:27:41,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886320127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:41,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059359684] [2021-06-05 06:27:41,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:41,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:41,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:41,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:27:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:41,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:41,422 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:27:41,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-06-05 06:27:41,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:41,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:41,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:41,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:3 [2021-06-05 06:27:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:41,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059359684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:41,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:41,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 06:27:41,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155146503] [2021-06-05 06:27:41,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:27:41,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:41,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:27:41,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:27:41,451 INFO L87 Difference]: Start difference. First operand 8092 states and 27424 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:42,159 INFO L93 Difference]: Finished difference Result 9702 states and 32370 transitions. [2021-06-05 06:27:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:27:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:42,174 INFO L225 Difference]: With dead ends: 9702 [2021-06-05 06:27:42,174 INFO L226 Difference]: Without dead ends: 9676 [2021-06-05 06:27:42,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 656.8ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:27:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9676 states. [2021-06-05 06:27:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9676 to 8222. [2021-06-05 06:27:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8222 states, 8221 states have (on average 3.392044763410777) internal successors, (27886), 8221 states have internal predecessors, (27886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8222 states to 8222 states and 27886 transitions. [2021-06-05 06:27:42,292 INFO L78 Accepts]: Start accepts. Automaton has 8222 states and 27886 transitions. Word has length 30 [2021-06-05 06:27:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:42,292 INFO L482 AbstractCegarLoop]: Abstraction has 8222 states and 27886 transitions. [2021-06-05 06:27:42,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8222 states and 27886 transitions. [2021-06-05 06:27:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:42,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:42,302 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:42,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:42,503 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash 286905412, now seen corresponding path program 177 times [2021-06-05 06:27:42,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:42,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260440111] [2021-06-05 06:27:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:42,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260440111] [2021-06-05 06:27:42,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260440111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220357461] [2021-06-05 06:27:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:42,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:27:42,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:42,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:27:42,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:43,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:43,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 06:27:43,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:43,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:43,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:43,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:196 [2021-06-05 06:27:43,291 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-06-05 06:27:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:43,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220357461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:43,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:43,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:27:43,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249768555] [2021-06-05 06:27:43,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:27:43,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:43,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:27:43,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:27:43,445 INFO L87 Difference]: Start difference. First operand 8222 states and 27886 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:45,345 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 06:27:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:46,467 INFO L93 Difference]: Finished difference Result 11199 states and 37100 transitions. [2021-06-05 06:27:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:27:46,467 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:46,485 INFO L225 Difference]: With dead ends: 11199 [2021-06-05 06:27:46,485 INFO L226 Difference]: Without dead ends: 11139 [2021-06-05 06:27:46,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 2412.6ms TimeCoverageRelationStatistics Valid=393, Invalid=2577, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:27:46,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11139 states. [2021-06-05 06:27:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11139 to 8241. [2021-06-05 06:27:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8241 states, 8240 states have (on average 3.391140776699029) internal successors, (27943), 8240 states have internal predecessors, (27943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 27943 transitions. [2021-06-05 06:27:46,622 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 27943 transitions. Word has length 30 [2021-06-05 06:27:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:46,622 INFO L482 AbstractCegarLoop]: Abstraction has 8241 states and 27943 transitions. [2021-06-05 06:27:46,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 27943 transitions. [2021-06-05 06:27:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:46,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:46,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:46,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-06-05 06:27:46,833 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:46,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1741977302, now seen corresponding path program 178 times [2021-06-05 06:27:46,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:46,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288736896] [2021-06-05 06:27:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:47,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:47,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288736896] [2021-06-05 06:27:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288736896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:47,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580638167] [2021-06-05 06:27:47,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:47,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:27:47,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:47,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:27:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:47,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:47,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:47,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:47,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-06-05 06:27:47,379 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:47,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:47,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:47,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 06:27:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:47,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580638167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:47,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:47,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:27:47,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637994842] [2021-06-05 06:27:47,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:27:47,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:47,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:27:47,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:27:47,463 INFO L87 Difference]: Start difference. First operand 8241 states and 27943 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:48,560 INFO L93 Difference]: Finished difference Result 10697 states and 35823 transitions. [2021-06-05 06:27:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:27:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:48,578 INFO L225 Difference]: With dead ends: 10697 [2021-06-05 06:27:48,578 INFO L226 Difference]: Without dead ends: 10659 [2021-06-05 06:27:48,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:27:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10659 states. [2021-06-05 06:27:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10659 to 8238. [2021-06-05 06:27:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8238 states, 8237 states have (on average 3.391283234187204) internal successors, (27934), 8237 states have internal predecessors, (27934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8238 states to 8238 states and 27934 transitions. [2021-06-05 06:27:48,711 INFO L78 Accepts]: Start accepts. Automaton has 8238 states and 27934 transitions. Word has length 30 [2021-06-05 06:27:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:48,711 INFO L482 AbstractCegarLoop]: Abstraction has 8238 states and 27934 transitions. [2021-06-05 06:27:48,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 8238 states and 27934 transitions. [2021-06-05 06:27:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:48,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:48,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:48,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:48,922 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2014568145, now seen corresponding path program 66 times [2021-06-05 06:27:48,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:48,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780715145] [2021-06-05 06:27:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:49,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:49,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780715145] [2021-06-05 06:27:49,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780715145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:49,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096223535] [2021-06-05 06:27:49,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:49,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:27:49,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:27:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:49,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:49,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:49,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:49,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:49,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:27:49,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:49,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:49,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:49,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:27:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:49,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096223535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:49,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:49,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 06:27:49,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073511352] [2021-06-05 06:27:49,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:27:49,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:27:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:27:49,580 INFO L87 Difference]: Start difference. First operand 8238 states and 27934 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:52,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:52,093 INFO L93 Difference]: Finished difference Result 10705 states and 35738 transitions. [2021-06-05 06:27:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:27:52,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:52,111 INFO L225 Difference]: With dead ends: 10705 [2021-06-05 06:27:52,111 INFO L226 Difference]: Without dead ends: 10673 [2021-06-05 06:27:52,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 2153.3ms TimeCoverageRelationStatistics Valid=747, Invalid=3543, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:27:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2021-06-05 06:27:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 8214. [2021-06-05 06:27:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8214 states, 8213 states have (on average 3.389869718738585) internal successors, (27841), 8213 states have internal predecessors, (27841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8214 states to 8214 states and 27841 transitions. [2021-06-05 06:27:52,275 INFO L78 Accepts]: Start accepts. Automaton has 8214 states and 27841 transitions. Word has length 30 [2021-06-05 06:27:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:52,275 INFO L482 AbstractCegarLoop]: Abstraction has 8214 states and 27841 transitions. [2021-06-05 06:27:52,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8214 states and 27841 transitions. [2021-06-05 06:27:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:52,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:52,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:52,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:52,485 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:52,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1835546543, now seen corresponding path program 67 times [2021-06-05 06:27:52,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:52,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787225152] [2021-06-05 06:27:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:52,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:52,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787225152] [2021-06-05 06:27:52,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787225152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:52,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868497655] [2021-06-05 06:27:52,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:52,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:27:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:53,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:53,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:53,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:53,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:27:53,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:53,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:53,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:53,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:27:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:53,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868497655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:53,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:53,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:27:53,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508384217] [2021-06-05 06:27:53,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:27:53,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:53,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:27:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:27:53,080 INFO L87 Difference]: Start difference. First operand 8214 states and 27841 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:55,755 INFO L93 Difference]: Finished difference Result 10703 states and 35668 transitions. [2021-06-05 06:27:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:27:55,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:55,772 INFO L225 Difference]: With dead ends: 10703 [2021-06-05 06:27:55,772 INFO L226 Difference]: Without dead ends: 10657 [2021-06-05 06:27:55,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2091.3ms TimeCoverageRelationStatistics Valid=788, Invalid=4042, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:27:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10657 states. [2021-06-05 06:27:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10657 to 8210. [2021-06-05 06:27:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8210 states, 8209 states have (on average 3.390303325618224) internal successors, (27831), 8209 states have internal predecessors, (27831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8210 states to 8210 states and 27831 transitions. [2021-06-05 06:27:55,894 INFO L78 Accepts]: Start accepts. Automaton has 8210 states and 27831 transitions. Word has length 30 [2021-06-05 06:27:55,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:55,894 INFO L482 AbstractCegarLoop]: Abstraction has 8210 states and 27831 transitions. [2021-06-05 06:27:55,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8210 states and 27831 transitions. [2021-06-05 06:27:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:55,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:55,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:56,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-06-05 06:27:56,104 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:56,105 INFO L82 PathProgramCache]: Analyzing trace with hash -607854127, now seen corresponding path program 68 times [2021-06-05 06:27:56,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:56,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933727910] [2021-06-05 06:27:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:56,329 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-06-05 06:27:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:56,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:56,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933727910] [2021-06-05 06:27:56,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933727910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:56,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662587232] [2021-06-05 06:27:56,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:56,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:56,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:56,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:27:56,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:56,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:56,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:27:56,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:56,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:56,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:27:56,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:27:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:56,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662587232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:56,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:56,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 06:27:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115619791] [2021-06-05 06:27:56,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:27:56,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:27:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:27:56,849 INFO L87 Difference]: Start difference. First operand 8210 states and 27831 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:59,276 INFO L93 Difference]: Finished difference Result 10110 states and 33817 transitions. [2021-06-05 06:27:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:27:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:27:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:59,292 INFO L225 Difference]: With dead ends: 10110 [2021-06-05 06:27:59,293 INFO L226 Difference]: Without dead ends: 10068 [2021-06-05 06:27:59,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2171.1ms TimeCoverageRelationStatistics Valid=572, Invalid=3088, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:27:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10068 states. [2021-06-05 06:27:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10068 to 8212. [2021-06-05 06:27:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8212 states, 8211 states have (on average 3.390086469370357) internal successors, (27836), 8211 states have internal predecessors, (27836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8212 states to 8212 states and 27836 transitions. [2021-06-05 06:27:59,417 INFO L78 Accepts]: Start accepts. Automaton has 8212 states and 27836 transitions. Word has length 30 [2021-06-05 06:27:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:59,418 INFO L482 AbstractCegarLoop]: Abstraction has 8212 states and 27836 transitions. [2021-06-05 06:27:59,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8212 states and 27836 transitions. [2021-06-05 06:27:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:27:59,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:59,427 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:59,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-06-05 06:27:59,628 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1428836237, now seen corresponding path program 69 times [2021-06-05 06:27:59,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:59,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61053732] [2021-06-05 06:27:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:59,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:59,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61053732] [2021-06-05 06:27:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61053732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:59,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534822745] [2021-06-05 06:27:59,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:59,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:27:59,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:59,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:27:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:00,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:00,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:00,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 33 [2021-06-05 06:28:00,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:00,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:00,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:00,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:137 [2021-06-05 06:28:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:00,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534822745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:00,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:00,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-06-05 06:28:00,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314545205] [2021-06-05 06:28:00,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:28:00,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:00,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:28:00,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:28:00,486 INFO L87 Difference]: Start difference. First operand 8212 states and 27836 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:02,586 INFO L93 Difference]: Finished difference Result 10254 states and 34243 transitions. [2021-06-05 06:28:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:28:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:28:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:02,602 INFO L225 Difference]: With dead ends: 10254 [2021-06-05 06:28:02,602 INFO L226 Difference]: Without dead ends: 10201 [2021-06-05 06:28:02,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1696.7ms TimeCoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:28:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10201 states. [2021-06-05 06:28:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10201 to 8200. [2021-06-05 06:28:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8200 states, 8199 states have (on average 3.391023295523844) internal successors, (27803), 8199 states have internal predecessors, (27803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8200 states to 8200 states and 27803 transitions. [2021-06-05 06:28:02,721 INFO L78 Accepts]: Start accepts. Automaton has 8200 states and 27803 transitions. Word has length 30 [2021-06-05 06:28:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:02,721 INFO L482 AbstractCegarLoop]: Abstraction has 8200 states and 27803 transitions. [2021-06-05 06:28:02,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 8200 states and 27803 transitions. [2021-06-05 06:28:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:28:02,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:02,731 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:02,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 06:28:02,932 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1675400721, now seen corresponding path program 70 times [2021-06-05 06:28:02,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:02,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864581929] [2021-06-05 06:28:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:03,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:03,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864581929] [2021-06-05 06:28:03,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864581929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:03,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548661290] [2021-06-05 06:28:03,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:03,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:28:03,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:28:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:03,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:03,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:03,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 43 [2021-06-05 06:28:03,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:03,508 INFO L628 ElimStorePlain]: treesize reduction 58, result has 40.2 percent of original size [2021-06-05 06:28:03,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:57 [2021-06-05 06:28:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:03,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548661290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:03,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:03,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 06:28:03,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107810101] [2021-06-05 06:28:03,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:28:03,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:03,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:28:03,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:28:03,657 INFO L87 Difference]: Start difference. First operand 8200 states and 27803 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:04,713 INFO L93 Difference]: Finished difference Result 10246 states and 34370 transitions. [2021-06-05 06:28:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:28:04,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:28:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:04,730 INFO L225 Difference]: With dead ends: 10246 [2021-06-05 06:28:04,730 INFO L226 Difference]: Without dead ends: 10220 [2021-06-05 06:28:04,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 910.9ms TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:28:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10220 states. [2021-06-05 06:28:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10220 to 8206. [2021-06-05 06:28:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8206 states, 8205 states have (on average 3.391712370505789) internal successors, (27829), 8205 states have internal predecessors, (27829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8206 states to 8206 states and 27829 transitions. [2021-06-05 06:28:04,918 INFO L78 Accepts]: Start accepts. Automaton has 8206 states and 27829 transitions. Word has length 30 [2021-06-05 06:28:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:04,918 INFO L482 AbstractCegarLoop]: Abstraction has 8206 states and 27829 transitions. [2021-06-05 06:28:04,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8206 states and 27829 transitions. [2021-06-05 06:28:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:28:04,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:04,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:05,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 06:28:05,129 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1730360697, now seen corresponding path program 71 times [2021-06-05 06:28:05,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:05,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819530937] [2021-06-05 06:28:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:05,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:05,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819530937] [2021-06-05 06:28:05,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819530937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:05,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729394508] [2021-06-05 06:28:05,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:05,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:28:05,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:05,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:28:05,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:05,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:05,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:05,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:05,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:05,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 06:28:05,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:05,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:05,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:05,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 06:28:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:05,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729394508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:05,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:05,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 06:28:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5236300] [2021-06-05 06:28:05,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:28:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:28:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:28:05,860 INFO L87 Difference]: Start difference. First operand 8206 states and 27829 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:09,726 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-06-05 06:28:10,392 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-05 06:28:11,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:11,194 INFO L93 Difference]: Finished difference Result 11385 states and 37270 transitions. [2021-06-05 06:28:11,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 06:28:11,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:28:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:11,212 INFO L225 Difference]: With dead ends: 11385 [2021-06-05 06:28:11,213 INFO L226 Difference]: Without dead ends: 11352 [2021-06-05 06:28:11,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 4502.2ms TimeCoverageRelationStatistics Valid=1364, Invalid=7008, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 06:28:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11352 states. [2021-06-05 06:28:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11352 to 8215. [2021-06-05 06:28:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8215 states, 8214 states have (on average 3.391770148526905) internal successors, (27860), 8214 states have internal predecessors, (27860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8215 states to 8215 states and 27860 transitions. [2021-06-05 06:28:11,354 INFO L78 Accepts]: Start accepts. Automaton has 8215 states and 27860 transitions. Word has length 30 [2021-06-05 06:28:11,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:11,354 INFO L482 AbstractCegarLoop]: Abstraction has 8215 states and 27860 transitions. [2021-06-05 06:28:11,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8215 states and 27860 transitions. [2021-06-05 06:28:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:28:11,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:11,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:11,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-06-05 06:28:11,564 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash 431528701, now seen corresponding path program 72 times [2021-06-05 06:28:11,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:11,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23645313] [2021-06-05 06:28:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:11,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:11,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23645313] [2021-06-05 06:28:11,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23645313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:11,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665787320] [2021-06-05 06:28:11,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:11,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:28:11,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:11,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:28:11,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:12,263 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 06:28:12,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 68 [2021-06-05 06:28:12,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:12,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:12,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:28:12,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:15 [2021-06-05 06:28:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:12,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665787320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:12,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:12,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 06:28:12,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850895158] [2021-06-05 06:28:12,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:28:12,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:28:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:28:12,325 INFO L87 Difference]: Start difference. First operand 8215 states and 27860 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:13,504 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 Received shutdown request... [2021-06-05 06:28:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:28:13,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 06:28:13,756 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:28:13,758 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:28:13,759 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:28:13,760 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:28:13 BasicIcfg [2021-06-05 06:28:13,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:28:13,760 INFO L168 Benchmark]: Toolchain (without parser) took 771920.95 ms. Allocated memory was 364.9 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 344.7 MB in the beginning and 690.9 MB in the end (delta: -346.3 MB). Peak memory consumption was 873.9 MB. Max. memory is 16.0 GB. [2021-06-05 06:28:13,760 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 364.9 MB. Free memory was 345.8 MB in the beginning and 345.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:28:13,760 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.85 ms. Allocated memory is still 364.9 MB. Free memory was 344.6 MB in the beginning and 343.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:28:13,760 INFO L168 Benchmark]: Boogie Preprocessor took 14.47 ms. Allocated memory is still 364.9 MB. Free memory was 343.1 MB in the beginning and 342.1 MB in the end (delta: 974.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:28:13,760 INFO L168 Benchmark]: RCFGBuilder took 224.23 ms. Allocated memory is still 364.9 MB. Free memory was 342.0 MB in the beginning and 330.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:28:13,760 INFO L168 Benchmark]: TraceAbstraction took 771633.69 ms. Allocated memory was 364.9 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 330.1 MB in the beginning and 690.9 MB in the end (delta: -360.8 MB). Peak memory consumption was 859.3 MB. Max. memory is 16.0 GB. [2021-06-05 06:28:13,761 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 364.9 MB. Free memory was 345.8 MB in the beginning and 345.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.85 ms. Allocated memory is still 364.9 MB. Free memory was 344.6 MB in the beginning and 343.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.47 ms. Allocated memory is still 364.9 MB. Free memory was 343.1 MB in the beginning and 342.1 MB in the end (delta: 974.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 224.23 ms. Allocated memory is still 364.9 MB. Free memory was 342.0 MB in the beginning and 330.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 771633.69 ms. Allocated memory was 364.9 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 330.1 MB in the beginning and 690.9 MB in the end (delta: -360.8 MB). Peak memory consumption was 859.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8215states) and FLOYD_HOARE automaton (currently 22 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (88 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8215states) and FLOYD_HOARE automaton (currently 22 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (88 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8215states) and FLOYD_HOARE automaton (currently 22 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (88 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (8215states) and FLOYD_HOARE automaton (currently 22 states, 28 states before enhancement),while ReachableStatesComputation was computing reachable states (88 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 771554.8ms, OverallIterations: 300, TraceHistogramMax: 2, EmptinessCheckTime: 2308.9ms, AutomataDifference: 528569.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 84.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18242 SDtfs, 75000 SDslu, 169571 SDs, 0 SdLazy, 355590 SolverSat, 18306 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 164463.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20190 GetRequests, 6085 SyntacticMatches, 394 SemanticMatches, 13711 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250791 ImplicationChecksByTransitivity, 422241.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8241occurred in iteration=292, InterpolantAutomatonStates: 11544, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31325.3ms AutomataMinimizationTime, 299 MinimizatonAttempts, 672596 StatesRemovedByMinimization, 299 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 875.1ms SsaConstructionTime, 2680.1ms SatisfiabilityAnalysisTime, 140349.6ms InterpolantComputationTime, 17247 NumberOfCodeBlocks, 17243 NumberOfCodeBlocksAsserted, 945 NumberOfCheckSat, 16655 ConstructedInterpolants, 342 QuantifiedInterpolants, 258908 SizeOfPredicates, 2048 NumberOfNonLiveVariables, 18898 ConjunctsInSsa, 6440 ConjunctsInUnsatCore, 592 InterpolantComputations, 8 PerfectInterpolantSequences, 198/4219 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown