/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/sum-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:08:14,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:08:14,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:08:14,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 07:08:14,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 07:08:14,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 07:08:14,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 07:08:14,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 07:08:14,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 07:08:14,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 07:08:14,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 07:08:14,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 07:08:14,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 07:08:14,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 07:08:14,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 07:08:14,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 07:08:14,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 07:08:14,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 07:08:14,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 07:08:14,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 07:08:14,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 07:08:14,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 07:08:14,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 07:08:14,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 07:08:14,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 07:08:14,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 07:08:14,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 07:08:14,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 07:08:14,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 07:08:14,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 07:08:14,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 07:08:14,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 07:08:14,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 07:08:14,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 07:08:14,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 07:08:14,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 07:08:14,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 07:08:14,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 07:08:14,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 07:08:14,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 07:08:14,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 07:08:14,692 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 07:08:14,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:08:14,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:08:14,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:08:14,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:08:14,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:08:14,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:08:14,717 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:08:14,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:08:14,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:08:14,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:08:14,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:08:14,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:08:14,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:08:14,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:08:14,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:08:14,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:08:14,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:08:14,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:08:14,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:08:14,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:08:14,720 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:08:14,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:08:14,720 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:08:14,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:08:14,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:08:14,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:08:14,994 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 07:08:14,995 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 07:08:14,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl [2021-06-05 07:08:14,996 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl' [2021-06-05 07:08:15,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:08:15,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 07:08:15,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:08:15,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:08:15,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:08:15,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/1) ... [2021-06-05 07:08:15,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/1) ... [2021-06-05 07:08:15,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:08:15,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:08:15,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:08:15,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:08:15,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/1) ... [2021-06-05 07:08:15,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/1) ... [2021-06-05 07:08:15,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/1) ... [2021-06-05 07:08:15,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/1) ... [2021-06-05 07:08:15,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/1) ... [2021-06-05 07:08:15,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/1) ... [2021-06-05 07:08:15,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/1) ... [2021-06-05 07:08:15,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:08:15,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:08:15,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:08:15,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:08:15,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (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 07:08:15,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 07:08:15,111 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 07:08:15,111 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 07:08:15,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 07:08:15,111 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 07:08:15,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 07:08:15,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 07:08:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:08:15,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:08:15,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 07:08:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 07:08:15,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 07:08:15,113 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 07:08:15,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:08:15,293 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 07:08:15,294 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:08:15 BoogieIcfgContainer [2021-06-05 07:08:15,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:08:15,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:08:15,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:08:15,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:08:15,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 07:08:15" (1/2) ... [2021-06-05 07:08:15,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4905e24f and model type sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:08:15, skipping insertion in model container [2021-06-05 07:08:15,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:08:15" (2/2) ... [2021-06-05 07:08:15,298 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun-alt.wvr.bpl [2021-06-05 07:08:15,302 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:08:15,302 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:08:15,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:08:15,302 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:08:15,326 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 07:08:15,339 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 07:08:15,357 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:08:15,357 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:08:15,357 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:08:15,357 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:08:15,357 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:08:15,357 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:08:15,357 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:08:15,357 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:08:15,363 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 07:08:15,377 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 07:08:15,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:15,385 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 07:08:15,385 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:15,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-06-05 07:08:15,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:15,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165636638] [2021-06-05 07:08:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:15,484 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 07:08:15,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:15,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165636638] [2021-06-05 07:08:15,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165636638] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:08:15,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:08:15,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 07:08:15,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140583825] [2021-06-05 07:08:15,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 07:08:15,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:15,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 07:08:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:08:15,501 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 07:08:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:15,545 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 07:08:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 07:08:15,546 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 07:08:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:15,560 INFO L225 Difference]: With dead ends: 217 [2021-06-05 07:08:15,560 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 07:08:15,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 07:08:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 07:08:15,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 07:08:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 07:08:15,619 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 07:08:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:15,620 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 07:08:15,620 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 07:08:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 07:08:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 07:08:15,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:15,622 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] [2021-06-05 07:08:15,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:08:15,622 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:15,622 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-06-05 07:08:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:15,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101626164] [2021-06-05 07:08:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:15,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:15,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101626164] [2021-06-05 07:08:15,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101626164] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:08:15,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:08:15,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:08:15,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497225930] [2021-06-05 07:08:15,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 07:08:15,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:15,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 07:08:15,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 07:08:15,674 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:15,709 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 07:08:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 07:08:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 07:08:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:15,711 INFO L225 Difference]: With dead ends: 158 [2021-06-05 07:08:15,711 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 07:08:15,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:08:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 07:08:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 07:08:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 07:08:15,717 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 07:08:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:15,717 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 07:08:15,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 07:08:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 07:08:15,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:15,721 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] [2021-06-05 07:08:15,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 07:08:15,721 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-06-05 07:08:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:15,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640055158] [2021-06-05 07:08:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:15,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640055158] [2021-06-05 07:08:15,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640055158] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:08:15,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:08:15,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 07:08:15,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353074327] [2021-06-05 07:08:15,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 07:08:15,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:15,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 07:08:15,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 07:08:15,757 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:15,788 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 07:08:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:08:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 07:08:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:15,790 INFO L225 Difference]: With dead ends: 183 [2021-06-05 07:08:15,790 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 07:08:15,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:08:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 07:08:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 07:08:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 07:08:15,796 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 07:08:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:15,796 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 07:08:15,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 07:08:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 07:08:15,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:15,798 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] [2021-06-05 07:08:15,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 07:08:15,798 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:15,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-06-05 07:08:15,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:15,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099375486] [2021-06-05 07:08:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:15,981 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 07:08:15,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:15,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099375486] [2021-06-05 07:08:15,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099375486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:15,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941151372] [2021-06-05 07:08:15,982 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 07:08:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:16,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:08:16,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:16,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:16,264 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 07:08:16,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:16,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:16,274 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 07:08:16,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-06-05 07:08:16,299 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 07:08:16,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941151372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:16,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:16,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:16,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436779028] [2021-06-05 07:08:16,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:16,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:16,305 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) 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 07:08:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:16,490 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 07:08:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:08:16,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) 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 22 [2021-06-05 07:08:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:16,492 INFO L225 Difference]: With dead ends: 330 [2021-06-05 07:08:16,492 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 07:08:16,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:08:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 07:08:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 07:08:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 07:08:16,516 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 07:08:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:16,516 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 07:08:16,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) 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 07:08:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 07:08:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 07:08:16,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:16,519 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] [2021-06-05 07:08:16,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:16,720 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:16,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-06-05 07:08:16,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:16,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321278532] [2021-06-05 07:08:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:16,865 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 07:08:16,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:16,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321278532] [2021-06-05 07:08:16,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321278532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:16,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898279889] [2021-06-05 07:08:16,865 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 07:08:16,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:16,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:16,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:08:16,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:16,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:16,985 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 07:08:16,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:08:16,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:17,002 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 07:08:17,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 07:08:17,046 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 07:08:17,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898279889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:17,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:17,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 07:08:17,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303687643] [2021-06-05 07:08:17,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:17,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:17,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:17,047 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 07:08:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:17,325 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 07:08:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:08:17,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-06-05 07:08:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:17,328 INFO L225 Difference]: With dead ends: 374 [2021-06-05 07:08:17,328 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 07:08:17,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:08:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 07:08:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 07:08:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 07:08:17,335 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 07:08:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:17,335 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 07:08:17,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 07:08:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 07:08:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 07:08:17,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:17,336 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] [2021-06-05 07:08:17,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:17,546 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:17,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:17,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-06-05 07:08:17,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:17,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513088467] [2021-06-05 07:08:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:17,649 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 07:08:17,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:17,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513088467] [2021-06-05 07:08:17,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513088467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:17,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751030419] [2021-06-05 07:08:17,650 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 07:08:17,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:08:17,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:17,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:08:17,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:17,765 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 07:08:17,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:17,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:17,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:17,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 07:08:17,788 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 07:08:17,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751030419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:17,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:17,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:08:17,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690949236] [2021-06-05 07:08:17,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:08:17,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:08:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:08:17,789 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) 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 07:08:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:17,908 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-05 07:08:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:08:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 22 [2021-06-05 07:08:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:17,910 INFO L225 Difference]: With dead ends: 363 [2021-06-05 07:08:17,910 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 07:08:17,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:08:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 07:08:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-05 07:08:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 07:08:17,916 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 07:08:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:17,916 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 07:08:17,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 07:08:17,916 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 07:08:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 07:08:17,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:17,917 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] [2021-06-05 07:08:18,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:18,132 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:18,132 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-06-05 07:08:18,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:18,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553094297] [2021-06-05 07:08:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:18,244 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 07:08:18,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:18,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553094297] [2021-06-05 07:08:18,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553094297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:18,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951676725] [2021-06-05 07:08:18,245 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 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 07:08:18,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:18,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:18,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:08:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:18,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:18,355 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 07:08:18,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:08:18,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:18,368 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 07:08:18,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:19 [2021-06-05 07:08:18,409 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 07:08:18,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951676725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:18,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:18,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:18,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161629918] [2021-06-05 07:08:18,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:18,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:18,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:18,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:18,410 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 07:08:18,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:18,593 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 07:08:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:08:18,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 22 [2021-06-05 07:08:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:18,596 INFO L225 Difference]: With dead ends: 425 [2021-06-05 07:08:18,596 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 07:08:18,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:08:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 07:08:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 07:08:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 07:08:18,617 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 07:08:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:18,617 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 07:08:18,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 07:08:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 07:08:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:18,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:18,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:18,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:18,834 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-06-05 07:08:18,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:18,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983054599] [2021-06-05 07:08:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:18,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:18,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983054599] [2021-06-05 07:08:18,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983054599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:18,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327995432] [2021-06-05 07:08:18,879 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:08:18,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:18,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:18,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:18,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:19,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327995432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:19,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:19,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:08:19,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496026328] [2021-06-05 07:08:19,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:19,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:19,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:19,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:19,004 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 07:08:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:19,369 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 07:08:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:08:19,370 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:08:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:19,372 INFO L225 Difference]: With dead ends: 619 [2021-06-05 07:08:19,372 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 07:08:19,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:08:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 07:08:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 07:08:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 07:08:19,379 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 07:08:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:19,380 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 07:08:19,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:08:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 07:08:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:19,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:19,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:19,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 07:08:19,596 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:19,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-06-05 07:08:19,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:19,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536138501] [2021-06-05 07:08:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:19,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:19,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536138501] [2021-06-05 07:08:19,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536138501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:19,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884287504] [2021-06-05 07:08:19,633 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 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 07:08:19,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:19,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:19,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:19,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884287504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:19,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:19,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:19,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292853770] [2021-06-05 07:08:19,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:19,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:19,758 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:08:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:20,417 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 07:08:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:08:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:20,421 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 07:08:20,421 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 07:08:20,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 07:08:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 07:08:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 07:08:20,433 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 07:08:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:20,433 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 07:08:20,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 07:08:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:20,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:20,435 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:20,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:20,651 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-06-05 07:08:20,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:20,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40474582] [2021-06-05 07:08:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:20,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:20,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40474582] [2021-06-05 07:08:20,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40474582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:20,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016876291] [2021-06-05 07:08:20,687 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 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 07:08:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:20,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:20,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016876291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:20,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:20,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:20,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700838057] [2021-06-05 07:08:20,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:20,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:20,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:20,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:20,793 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:08:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:21,367 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 07:08:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:08:21,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:21,372 INFO L225 Difference]: With dead ends: 951 [2021-06-05 07:08:21,372 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 07:08:21,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:08:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 07:08:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 07:08:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 07:08:21,386 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 07:08:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:21,386 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 07:08:21,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 07:08:21,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:21,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:21,386 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 07:08:21,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 07:08:21,601 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:21,601 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-06-05 07:08:21,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:21,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992022536] [2021-06-05 07:08:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:21,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:21,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992022536] [2021-06-05 07:08:21,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992022536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:21,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876714350] [2021-06-05 07:08:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:08:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:21,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:08:21,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:21,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876714350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:21,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:21,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:08:21,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038137825] [2021-06-05 07:08:21,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:08:21,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:21,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:08:21,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:08:21,720 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:21,809 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 07:08:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:08:21,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 07:08:21,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:21,811 INFO L225 Difference]: With dead ends: 669 [2021-06-05 07:08:21,811 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 07:08:21,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 07:08:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 07:08:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 07:08:21,821 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 07:08:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:21,821 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 07:08:21,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 07:08:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:21,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:21,822 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:22,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 07:08:22,037 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-06-05 07:08:22,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:22,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527317927] [2021-06-05 07:08:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:22,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:22,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527317927] [2021-06-05 07:08:22,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527317927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:22,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276228434] [2021-06-05 07:08:22,080 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 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 07:08:22,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:22,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:22,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:22,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276228434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:22,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:22,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:08:22,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069895795] [2021-06-05 07:08:22,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:22,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:22,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:22,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:22,186 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 07:08:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:22,339 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 07:08:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:08:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 24 [2021-06-05 07:08:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:22,342 INFO L225 Difference]: With dead ends: 710 [2021-06-05 07:08:22,342 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 07:08:22,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:08:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 07:08:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 07:08:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 07:08:22,353 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 07:08:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:22,353 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 07:08:22,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 07:08:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 07:08:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:22,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:22,354 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 07:08:22,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 07:08:22,569 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:22,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-06-05 07:08:22,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:22,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512957099] [2021-06-05 07:08:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:22,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:22,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512957099] [2021-06-05 07:08:22,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512957099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:22,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956494364] [2021-06-05 07:08:22,596 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 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 07:08:22,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:22,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:22,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:08:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:22,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956494364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:22,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:22,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:08:22,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305442033] [2021-06-05 07:08:22,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:08:22,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:22,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:08:22,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:08:22,680 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:22,780 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 07:08:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:08:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 07:08:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:22,783 INFO L225 Difference]: With dead ends: 830 [2021-06-05 07:08:22,783 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 07:08:22,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 07:08:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 07:08:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 07:08:22,794 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 07:08:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:22,794 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 07:08:22,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 07:08:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:22,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:22,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:23,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 07:08:23,009 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:23,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-06-05 07:08:23,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:23,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102248703] [2021-06-05 07:08:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:23,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:23,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102248703] [2021-06-05 07:08:23,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102248703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967967283] [2021-06-05 07:08:23,044 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 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 07:08:23,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:23,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:23,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967967283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:23,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:23,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:23,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832885081] [2021-06-05 07:08:23,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:08:23,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:23,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:08:23,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:08:23,139 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:23,393 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 07:08:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:08:23,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 07:08:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:23,397 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 07:08:23,397 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 07:08:23,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:08:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 07:08:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 07:08:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 07:08:23,411 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 07:08:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:23,411 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 07:08:23,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 07:08:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:23,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:23,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:23,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 07:08:23,628 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-06-05 07:08:23,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:23,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517775205] [2021-06-05 07:08:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:23,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:23,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517775205] [2021-06-05 07:08:23,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517775205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:23,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346915411] [2021-06-05 07:08:23,666 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 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 07:08:23,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346915411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:23,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:23,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:23,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129607189] [2021-06-05 07:08:23,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:08:23,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:23,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:08:23,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:08:23,749 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:24,112 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 07:08:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:08:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 07:08:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:24,117 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 07:08:24,117 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 07:08:24,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:08:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 07:08:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 07:08:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 07:08:24,132 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 07:08:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:24,132 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 07:08:24,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 07:08:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:24,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:24,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:24,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:24,341 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:24,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-06-05 07:08:24,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:24,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149677268] [2021-06-05 07:08:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:24,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:24,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149677268] [2021-06-05 07:08:24,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149677268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:24,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292169242] [2021-06-05 07:08:24,374 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 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 07:08:24,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:24,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:24,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:24,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:24,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292169242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:24,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:24,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:08:24,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215392262] [2021-06-05 07:08:24,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:24,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:24,505 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 07:08:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:24,720 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 07:08:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:08:24,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 24 [2021-06-05 07:08:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:24,725 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 07:08:24,725 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 07:08:24,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:08:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 07:08:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 07:08:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 07:08:24,740 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 07:08:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:24,740 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 07:08:24,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 07:08:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 07:08:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:24,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:24,742 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:24,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-05 07:08:24,957 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-06-05 07:08:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:24,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864350688] [2021-06-05 07:08:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:25,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:25,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864350688] [2021-06-05 07:08:25,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864350688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:25,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998085075] [2021-06-05 07:08:25,014 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 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 07:08:25,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:25,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:25,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:25,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:25,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998085075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:25,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:25,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 07:08:25,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101355743] [2021-06-05 07:08:25,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:25,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:25,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:25,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:25,118 INFO L87 Difference]: Start difference. First operand 758 states and 2441 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 07:08:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:25,361 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 07:08:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:08:25,361 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 07:08:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:25,365 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 07:08:25,365 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 07:08:25,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:08:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 07:08:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 07:08:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 07:08:25,380 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 07:08:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:25,380 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 07:08:25,380 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 07:08:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 07:08:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:25,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:25,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:25,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:25,601 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:25,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-06-05 07:08:25,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:25,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121292911] [2021-06-05 07:08:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:25,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:25,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121292911] [2021-06-05 07:08:25,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121292911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:25,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223829546] [2021-06-05 07:08:25,628 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 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 07:08:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:25,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:25,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:25,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223829546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:25,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:25,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:25,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801539309] [2021-06-05 07:08:25,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:08:25,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:25,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:08:25,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:08:25,723 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:26,009 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 07:08:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:08:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 07:08:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:26,014 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 07:08:26,014 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 07:08:26,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:08:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 07:08:26,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 07:08:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 07:08:26,031 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 07:08:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:26,031 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 07:08:26,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 07:08:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:26,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:26,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:26,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 07:08:26,241 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-06-05 07:08:26,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:26,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786133642] [2021-06-05 07:08:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:26,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:26,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786133642] [2021-06-05 07:08:26,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786133642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:26,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498685112] [2021-06-05 07:08:26,277 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 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 07:08:26,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:26,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:26,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498685112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:26,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:26,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:26,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279522235] [2021-06-05 07:08:26,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:26,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:26,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:26,411 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:08:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:27,047 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 07:08:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:08:27,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:27,056 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 07:08:27,056 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 07:08:27,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 07:08:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 07:08:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:27,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 07:08:27,079 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 07:08:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:27,079 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 07:08:27,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 07:08:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:27,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:27,081 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:27,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:27,296 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-06-05 07:08:27,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:27,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662342437] [2021-06-05 07:08:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:27,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:27,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662342437] [2021-06-05 07:08:27,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662342437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:27,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643133597] [2021-06-05 07:08:27,330 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 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 07:08:27,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:27,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:27,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:27,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643133597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:27,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:27,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:27,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489722940] [2021-06-05 07:08:27,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:27,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:27,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:27,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:27,425 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:08:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:28,031 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 07:08:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:08:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:28,037 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 07:08:28,037 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 07:08:28,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 07:08:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 07:08:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 07:08:28,060 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 07:08:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:28,060 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 07:08:28,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 07:08:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:28,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:28,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:28,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 07:08:28,277 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-06-05 07:08:28,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:28,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707904319] [2021-06-05 07:08:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:28,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:28,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707904319] [2021-06-05 07:08:28,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707904319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:28,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548554263] [2021-06-05 07:08:28,310 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 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 07:08:28,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:28,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:28,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:28,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:28,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548554263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:28,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:28,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:08:28,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863862219] [2021-06-05 07:08:28,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:28,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:28,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:28,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:28,404 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:28,938 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 07:08:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:08:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:28,943 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 07:08:28,943 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 07:08:28,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:08:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 07:08:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 07:08:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 07:08:28,967 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 07:08:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:28,967 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 07:08:28,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 07:08:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:28,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:28,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:29,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 07:08:29,177 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-06-05 07:08:29,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:29,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28214713] [2021-06-05 07:08:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:29,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28214713] [2021-06-05 07:08:29,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28214713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722465027] [2021-06-05 07:08:29,207 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 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 07:08:29,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:08:29,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:29,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:29,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:29,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722465027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:29,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:29,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:08:29,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360320696] [2021-06-05 07:08:29,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:29,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:29,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:29,295 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:29,780 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 07:08:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:08:29,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:29,785 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 07:08:29,785 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 07:08:29,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:08:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 07:08:29,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 07:08:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 07:08:29,823 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 07:08:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:29,823 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 07:08:29,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 07:08:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:29,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:29,825 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:30,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 07:08:30,042 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:30,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:30,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-06-05 07:08:30,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:30,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313747708] [2021-06-05 07:08:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:30,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:30,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313747708] [2021-06-05 07:08:30,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313747708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:30,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593789126] [2021-06-05 07:08:30,073 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 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 07:08:30,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:08:30,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:30,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:30,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593789126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:30,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:30,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:30,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269447643] [2021-06-05 07:08:30,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:30,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:30,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:30,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:30,165 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:30,742 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 07:08:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:08:30,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 07:08:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:30,746 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 07:08:30,747 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 07:08:30,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:08:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 07:08:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 07:08:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 07:08:30,768 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 07:08:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:30,768 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 07:08:30,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 07:08:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:30,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:30,770 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:30,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 07:08:30,985 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:30,985 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-06-05 07:08:30,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:30,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126026912] [2021-06-05 07:08:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:31,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:31,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126026912] [2021-06-05 07:08:31,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126026912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:31,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689728915] [2021-06-05 07:08:31,015 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 07:08:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:31,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:31,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:31,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689728915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:31,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:31,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:31,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164102333] [2021-06-05 07:08:31,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:31,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:31,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:31,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:31,106 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:31,710 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 07:08:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:08:31,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 07:08:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:31,715 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 07:08:31,715 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 07:08:31,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:08:31,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 07:08:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 07:08:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 07:08:31,735 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 07:08:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:31,735 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 07:08:31,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 07:08:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:31,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:31,737 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 07:08:31,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 07:08:31,952 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:31,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-06-05 07:08:31,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:31,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998481207] [2021-06-05 07:08:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:31,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:31,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998481207] [2021-06-05 07:08:31,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998481207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:31,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360037629] [2021-06-05 07:08:31,981 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 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 07:08:32,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:08:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 07:08:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:32,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360037629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:32,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:32,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 07:08:32,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960231772] [2021-06-05 07:08:32,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:08:32,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:32,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:08:32,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:08:32,048 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:32,116 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 07:08:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 07:08:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 07:08:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:32,118 INFO L225 Difference]: With dead ends: 929 [2021-06-05 07:08:32,118 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 07:08:32,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 07:08:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 07:08:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 07:08:32,128 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 07:08:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:32,129 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 07:08:32,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 07:08:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:32,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:32,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:32,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:32,346 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:32,346 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-06-05 07:08:32,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:32,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857415714] [2021-06-05 07:08:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:32,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857415714] [2021-06-05 07:08:32,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857415714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293513114] [2021-06-05 07:08:32,375 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 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 07:08:32,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:32,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:32,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:32,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293513114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:32,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:32,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:08:32,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383996577] [2021-06-05 07:08:32,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:08:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:08:32,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:08:32,445 INFO L87 Difference]: Start difference. First operand 780 states and 2573 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 07:08:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:32,718 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 07:08:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:08:32,718 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 24 [2021-06-05 07:08:32,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:32,725 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 07:08:32,725 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 07:08:32,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:08:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 07:08:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 07:08:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 07:08:32,770 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 07:08:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:32,770 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 07:08:32,771 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 07:08:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 07:08:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:32,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:32,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:32,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:32,985 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:32,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-06-05 07:08:32,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:32,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841290153] [2021-06-05 07:08:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:33,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:33,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841290153] [2021-06-05 07:08:33,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841290153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:33,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552614347] [2021-06-05 07:08:33,009 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 07:08:33,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:33,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:33,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:33,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552614347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:33,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:33,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:08:33,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354315037] [2021-06-05 07:08:33,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:08:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:08:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:08:33,080 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 07:08:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:33,299 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 07:08:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:08:33,299 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-06-05 07:08:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:33,302 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 07:08:33,302 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 07:08:33,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:08:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 07:08:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 07:08:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 07:08:33,316 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 07:08:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:33,316 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 07:08:33,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 07:08:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 07:08:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:33,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:33,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:33,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:33,533 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-06-05 07:08:33,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:33,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963375235] [2021-06-05 07:08:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:33,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:33,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963375235] [2021-06-05 07:08:33,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963375235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:33,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795762166] [2021-06-05 07:08:33,563 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 07:08:33,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:33,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:33,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:33,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:08:33,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795762166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:33,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:33,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 07:08:33,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494432893] [2021-06-05 07:08:33,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 07:08:33,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 07:08:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 07:08:33,635 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 07:08:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:33,803 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 07:08:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:08:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-06-05 07:08:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:33,805 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 07:08:33,805 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 07:08:33,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:08:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 07:08:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 07:08:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 07:08:33,818 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 07:08:33,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:33,818 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 07:08:33,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 07:08:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 07:08:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:33,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:33,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:34,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 07:08:34,036 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:34,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-06-05 07:08:34,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:34,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611322305] [2021-06-05 07:08:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:34,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:34,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611322305] [2021-06-05 07:08:34,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611322305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:34,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685435045] [2021-06-05 07:08:34,065 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) [2021-06-05 07:08:34,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:34,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:34,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:34,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685435045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:34,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:34,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:08:34,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125385562] [2021-06-05 07:08:34,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:08:34,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:34,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:08:34,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:08:34,141 INFO L87 Difference]: Start difference. First operand 896 states and 2943 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 07:08:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:34,337 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 07:08:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:08:34,338 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 24 [2021-06-05 07:08:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:34,340 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 07:08:34,340 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 07:08:34,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:08:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 07:08:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 07:08:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 07:08:34,353 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 07:08:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:34,353 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 07:08:34,353 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 07:08:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 07:08:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:34,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:34,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:34,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:34,569 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:34,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-06-05 07:08:34,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:34,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288883877] [2021-06-05 07:08:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:34,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:34,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288883877] [2021-06-05 07:08:34,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288883877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:34,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943128462] [2021-06-05 07:08:34,603 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 07:08:34,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:34,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:34,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943128462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:34,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:34,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:34,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464469645] [2021-06-05 07:08:34,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:34,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:34,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:34,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:34,710 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:08:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:35,152 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 07:08:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:08:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:35,155 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 07:08:35,155 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 07:08:35,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:08:35,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 07:08:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 07:08:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 07:08:35,172 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 07:08:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:35,173 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 07:08:35,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 07:08:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:35,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:35,174 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:35,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 07:08:35,379 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:35,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-06-05 07:08:35,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:35,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812568347] [2021-06-05 07:08:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:35,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:35,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812568347] [2021-06-05 07:08:35,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812568347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:35,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151074486] [2021-06-05 07:08:35,409 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 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 07:08:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:35,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151074486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:35,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:35,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:35,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906849889] [2021-06-05 07:08:35,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:35,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:35,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:35,502 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:08:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:35,905 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 07:08:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:08:35,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:35,909 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 07:08:35,909 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 07:08:35,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:08:35,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 07:08:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 07:08:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 07:08:35,937 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 07:08:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:35,938 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 07:08:35,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:08:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 07:08:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:35,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:35,939 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:36,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:36,141 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-06-05 07:08:36,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:36,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610287661] [2021-06-05 07:08:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:36,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:36,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610287661] [2021-06-05 07:08:36,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610287661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:36,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135930347] [2021-06-05 07:08:36,173 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:08:36,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:36,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:36,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:36,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135930347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:36,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:36,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:08:36,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984925232] [2021-06-05 07:08:36,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:36,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:36,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:36,260 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:36,617 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 07:08:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:08:36,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:36,620 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 07:08:36,620 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 07:08:36,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:08:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 07:08:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 07:08:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 07:08:36,637 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 07:08:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:36,637 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 07:08:36,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 07:08:36,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:36,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:36,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:36,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 07:08:36,839 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:36,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-06-05 07:08:36,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:36,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870874893] [2021-06-05 07:08:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:36,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:36,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870874893] [2021-06-05 07:08:36,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870874893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:36,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083613405] [2021-06-05 07:08:36,872 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 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 07:08:36,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:36,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:36,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:36,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:36,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083613405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:36,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:36,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:08:36,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817478598] [2021-06-05 07:08:36,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:36,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:36,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:36,950 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:37,265 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 07:08:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:08:37,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:37,268 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 07:08:37,268 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 07:08:37,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:08:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 07:08:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 07:08:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 07:08:37,284 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 07:08:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:37,285 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 07:08:37,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 07:08:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:37,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:37,286 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:37,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:37,501 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-06-05 07:08:37,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:37,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829644371] [2021-06-05 07:08:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:37,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:37,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829644371] [2021-06-05 07:08:37,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829644371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:37,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69255402] [2021-06-05 07:08:37,530 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 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 07:08:37,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:37,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:37,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:37,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:37,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69255402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:37,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:37,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:37,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142471337] [2021-06-05 07:08:37,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:37,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:37,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:37,629 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:37,959 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 07:08:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:08:37,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 07:08:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:37,962 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 07:08:37,962 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 07:08:37,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 07:08:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 07:08:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 07:08:37,979 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 07:08:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:37,979 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 07:08:37,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 07:08:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:37,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:37,980 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:38,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 07:08:38,185 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:38,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:38,185 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-06-05 07:08:38,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:38,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718783397] [2021-06-05 07:08:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:38,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718783397] [2021-06-05 07:08:38,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718783397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266312077] [2021-06-05 07:08:38,220 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:08:38,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:38,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:38,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:38,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:38,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266312077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:38,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:38,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:38,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788222009] [2021-06-05 07:08:38,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:38,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:38,308 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:38,623 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 07:08:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 07:08:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:38,626 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 07:08:38,626 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 07:08:38,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:08:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 07:08:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 07:08:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 07:08:38,642 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 07:08:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:38,642 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 07:08:38,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 07:08:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:38,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:38,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:38,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 07:08:38,857 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:38,857 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-06-05 07:08:38,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:38,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799439070] [2021-06-05 07:08:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:38,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:38,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799439070] [2021-06-05 07:08:38,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799439070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:38,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408734604] [2021-06-05 07:08:38,884 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 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 07:08:38,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:38,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:38,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:38,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408734604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:38,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:38,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:38,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610653164] [2021-06-05 07:08:38,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:08:38,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:38,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:08:38,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:08:38,960 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 07:08:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:39,259 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 07:08:39,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:08:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 07:08:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:39,262 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 07:08:39,262 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 07:08:39,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 07:08:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 07:08:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 07:08:39,279 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 07:08:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:39,279 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 07:08:39,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 07:08:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 07:08:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:39,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:39,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:39,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 07:08:39,481 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-06-05 07:08:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:39,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844503928] [2021-06-05 07:08:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:39,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:39,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844503928] [2021-06-05 07:08:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844503928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:39,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784717365] [2021-06-05 07:08:39,508 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 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 07:08:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:39,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:39,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:39,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784717365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:39,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:39,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:39,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017870048] [2021-06-05 07:08:39,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:08:39,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:08:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:08:39,591 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 07:08:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:39,827 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 07:08:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:08:39,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 07:08:39,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:39,829 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 07:08:39,829 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 07:08:39,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:08:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 07:08:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 07:08:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 07:08:39,846 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 07:08:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:39,846 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 07:08:39,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 07:08:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 07:08:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:39,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:39,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:40,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 07:08:40,065 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-06-05 07:08:40,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:40,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507286486] [2021-06-05 07:08:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:40,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:40,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507286486] [2021-06-05 07:08:40,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507286486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:40,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688715464] [2021-06-05 07:08:40,091 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 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 07:08:40,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:40,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:40,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:40,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:40,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688715464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:40,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:40,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:08:40,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912896957] [2021-06-05 07:08:40,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:08:40,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:40,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:08:40,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:08:40,173 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 07:08:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:40,366 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 07:08:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:08:40,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 07:08:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:40,368 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 07:08:40,368 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 07:08:40,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:08:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 07:08:40,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 07:08:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 07:08:40,382 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 07:08:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:40,382 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 07:08:40,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 07:08:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 07:08:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:40,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:40,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:40,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:40,590 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:40,591 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-06-05 07:08:40,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:40,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358653228] [2021-06-05 07:08:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:40,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:40,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358653228] [2021-06-05 07:08:40,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358653228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:40,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240383851] [2021-06-05 07:08:40,627 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 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 07:08:40,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:40,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:40,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:40,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:40,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240383851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:40,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:40,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:40,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810282149] [2021-06-05 07:08:40,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:40,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:40,719 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:41,008 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 07:08:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:08:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 07:08:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:41,010 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 07:08:41,011 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 07:08:41,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:08:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 07:08:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 07:08:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 07:08:41,026 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 07:08:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:41,026 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 07:08:41,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 07:08:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:41,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:41,028 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:41,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 07:08:41,241 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-06-05 07:08:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:41,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238379788] [2021-06-05 07:08:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:41,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238379788] [2021-06-05 07:08:41,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238379788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206216895] [2021-06-05 07:08:41,270 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 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 07:08:41,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:41,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:41,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:41,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:41,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206216895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:41,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:41,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 07:08:41,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646404078] [2021-06-05 07:08:41,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:08:41,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:41,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:08:41,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:08:41,353 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:41,591 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 07:08:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:08:41,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 07:08:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:41,594 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 07:08:41,594 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 07:08:41,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:08:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 07:08:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 07:08:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 07:08:41,608 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 07:08:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:41,608 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 07:08:41,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 07:08:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 07:08:41,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 07:08:41,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:41,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:41,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 07:08:41,811 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-06-05 07:08:41,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:41,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425100643] [2021-06-05 07:08:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:41,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:41,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425100643] [2021-06-05 07:08:41,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425100643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:41,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728399530] [2021-06-05 07:08:41,840 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 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 07:08:41,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:41,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:08:41,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:41,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728399530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:41,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:41,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 07:08:41,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013841138] [2021-06-05 07:08:41,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:08:41,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:41,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:08:41,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:08:41,922 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:42,072 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 07:08:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:08:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:42,074 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 07:08:42,075 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 07:08:42,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:08:42,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 07:08:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 07:08:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 07:08:42,091 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 07:08:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:42,091 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 07:08:42,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 07:08:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 07:08:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:08:42,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:42,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:08:42,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:42,308 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:42,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-06-05 07:08:42,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:42,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514887630] [2021-06-05 07:08:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:42,514 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 07:08:42,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:42,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514887630] [2021-06-05 07:08:42,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514887630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:42,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351392510] [2021-06-05 07:08:42,514 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 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 07:08:42,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:42,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:42,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:08:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:42,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:42,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:42,711 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 07:08:42,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:42,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:42,717 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 07:08:42,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:08:42,730 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 07:08:42,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351392510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:42,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:42,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:08:42,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702830446] [2021-06-05 07:08:42,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:08:42,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:42,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:08:42,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:08:42,731 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:08:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:43,182 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 07:08:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:08:43,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-06-05 07:08:43,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:43,184 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 07:08:43,184 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 07:08:43,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:08:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 07:08:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 07:08:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 07:08:43,197 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 07:08:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:43,198 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 07:08:43,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:08:43,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 07:08:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:08:43,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:43,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:08:43,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 07:08:43,400 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:43,400 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-06-05 07:08:43,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:43,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725688924] [2021-06-05 07:08:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:43,592 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 07:08:43,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:43,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725688924] [2021-06-05 07:08:43,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725688924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:43,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660711655] [2021-06-05 07:08:43,592 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 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 07:08:43,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:43,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:08:43,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:43,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:43,805 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 07:08:43,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:43,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:43,810 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 07:08:43,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:08:43,826 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 07:08:43,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660711655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:43,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:43,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:08:43,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217559971] [2021-06-05 07:08:43,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:08:43,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:43,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:08:43,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:08:43,827 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 07:08:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:44,538 INFO L93 Difference]: Finished difference Result 1498 states and 4907 transitions. [2021-06-05 07:08:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:08:44,538 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 26 [2021-06-05 07:08:44,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:44,540 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 07:08:44,540 INFO L226 Difference]: Without dead ends: 1483 [2021-06-05 07:08:44,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:08:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-06-05 07:08:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1150. [2021-06-05 07:08:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 07:08:44,554 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 07:08:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:44,555 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 07:08:44,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 07:08:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 07:08:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:08:44,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:44,556 INFO L521 BasicCegarLoop]: trace histogram [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 07:08:44,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:44,757 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-06-05 07:08:44,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:44,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737297246] [2021-06-05 07:08:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:45,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:45,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737297246] [2021-06-05 07:08:45,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737297246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:45,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835747521] [2021-06-05 07:08:45,012 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 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 07:08:45,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:45,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:45,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:08:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:45,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:45,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:45,175 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 07:08:45,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:45,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:45,181 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 07:08:45,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:08:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:45,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835747521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:45,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:45,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 07:08:45,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947582846] [2021-06-05 07:08:45,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:08:45,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:45,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:08:45,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:08:45,197 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 07:08:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:46,925 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-06-05 07:08:46,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:08:46,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 26 [2021-06-05 07:08:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:46,927 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 07:08:46,927 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 07:08:46,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1674.4ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:08:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 07:08:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-06-05 07:08:46,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 07:08:46,942 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 07:08:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:46,942 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 07:08:46,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 07:08:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 07:08:46,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:08:46,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:46,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:08:47,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 07:08:47,144 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-06-05 07:08:47,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:47,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926220405] [2021-06-05 07:08:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:47,324 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 07:08:47,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926220405] [2021-06-05 07:08:47,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926220405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026905719] [2021-06-05 07:08:47,324 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 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 07:08:47,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:47,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:47,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:08:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:47,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:47,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:47,469 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 19 treesize of output 19 [2021-06-05 07:08:47,471 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:08:47,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:47,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:47,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 07:08:47,525 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 07:08:47,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026905719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:47,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:47,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:08:47,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313162184] [2021-06-05 07:08:47,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:08:47,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:47,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:08:47,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:08:47,526 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:08:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:48,869 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-06-05 07:08:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:08:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-06-05 07:08:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:48,872 INFO L225 Difference]: With dead ends: 1879 [2021-06-05 07:08:48,872 INFO L226 Difference]: Without dead ends: 1864 [2021-06-05 07:08:48,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1061.2ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:08:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-06-05 07:08:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-06-05 07:08:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-05 07:08:48,888 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-05 07:08:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:48,888 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-05 07:08:48,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:08:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-05 07:08:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:08:48,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:48,890 INFO L521 BasicCegarLoop]: trace histogram [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 07:08:49,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 07:08:49,090 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:49,090 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-06-05 07:08:49,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:49,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021084481] [2021-06-05 07:08:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:49,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021084481] [2021-06-05 07:08:49,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021084481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126214493] [2021-06-05 07:08:49,353 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 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 07:08:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:49,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:08:49,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:49,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:49,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:49,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:49,529 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 07:08:49,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:49,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:49,534 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 07:08:49,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:08:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:49,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126214493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:49,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:49,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 07:08:49,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621350334] [2021-06-05 07:08:49,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:08:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:08:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:08:49,549 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 07:08:51,403 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-05 07:08:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:51,831 INFO L93 Difference]: Finished difference Result 1869 states and 5964 transitions. [2021-06-05 07:08:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:08:51,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 26 [2021-06-05 07:08:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:51,833 INFO L225 Difference]: With dead ends: 1869 [2021-06-05 07:08:51,834 INFO L226 Difference]: Without dead ends: 1854 [2021-06-05 07:08:51,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 2060.6ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:08:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-06-05 07:08:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1206. [2021-06-05 07:08:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-05 07:08:51,848 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-05 07:08:51,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:51,849 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-05 07:08:51,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 07:08:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-05 07:08:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:08:51,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:51,850 INFO L521 BasicCegarLoop]: trace histogram [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 07:08:52,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:52,051 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:52,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-06-05 07:08:52,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:52,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205560369] [2021-06-05 07:08:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:52,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:52,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205560369] [2021-06-05 07:08:52,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205560369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:52,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114986254] [2021-06-05 07:08:52,243 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 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 07:08:52,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:52,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:52,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:08:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:52,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:52,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 59 [2021-06-05 07:08:52,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:08:52,864 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 07:08:52,865 INFO L628 ElimStorePlain]: treesize reduction 131, result has 54.2 percent of original size [2021-06-05 07:08:53,002 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 07:08:53,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:692 [2021-06-05 07:08:53,362 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-05 07:08:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:53,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114986254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:53,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:53,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 07:08:53,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358703981] [2021-06-05 07:08:53,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:08:53,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:08:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:08:53,559 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 07:08:55,008 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2021-06-05 07:08:55,523 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 07:08:55,736 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-06-05 07:08:55,893 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-06-05 07:08:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:55,932 INFO L93 Difference]: Finished difference Result 2129 states and 6755 transitions. [2021-06-05 07:08:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:08:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 26 [2021-06-05 07:08:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:55,935 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 07:08:55,935 INFO L226 Difference]: Without dead ends: 2114 [2021-06-05 07:08:55,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2494.9ms TimeCoverageRelationStatistics Valid=373, Invalid=2177, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-06-05 07:08:55,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1219. [2021-06-05 07:08:55,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-06-05 07:08:55,952 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-06-05 07:08:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:55,953 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-06-05 07:08:55,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 07:08:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-06-05 07:08:55,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:08:55,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:55,955 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:08:56,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 07:08:56,155 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-06-05 07:08:56,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:56,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749484055] [2021-06-05 07:08:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:56,329 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 07:08:56,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:56,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749484055] [2021-06-05 07:08:56,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749484055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:56,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709857888] [2021-06-05 07:08:56,329 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 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 07:08:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:56,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:08:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:56,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:56,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:08:56,496 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 07:08:56,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:56,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:56,501 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 07:08:56,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:08:56,515 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 07:08:56,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709857888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:56,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:56,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:08:56,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701595458] [2021-06-05 07:08:56,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:08:56,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:56,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:08:56,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:08:56,516 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:08:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:57,026 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-06-05 07:08:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:08:57,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-06-05 07:08:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:57,028 INFO L225 Difference]: With dead ends: 1622 [2021-06-05 07:08:57,028 INFO L226 Difference]: Without dead ends: 1607 [2021-06-05 07:08:57,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 516.6ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:08:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-05 07:08:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-06-05 07:08:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-06-05 07:08:57,043 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-06-05 07:08:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:57,043 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-06-05 07:08:57,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:08:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-06-05 07:08:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:08:57,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:57,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:08:57,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:57,258 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-06-05 07:08:57,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:57,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186924117] [2021-06-05 07:08:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:57,431 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 07:08:57,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:57,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186924117] [2021-06-05 07:08:57,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186924117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:57,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052875233] [2021-06-05 07:08:57,432 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 07:08:57,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:57,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:08:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:57,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:08:57,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:57,628 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 07:08:57,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:08:57,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:57,670 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 07:08:57,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:117 [2021-06-05 07:08:57,813 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 07:08:57,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052875233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:57,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:57,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:08:57,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300691997] [2021-06-05 07:08:57,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:08:57,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:08:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:08:57,814 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 07:08:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:59,608 INFO L93 Difference]: Finished difference Result 1952 states and 6191 transitions. [2021-06-05 07:08:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:08:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-06-05 07:08:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:59,611 INFO L225 Difference]: With dead ends: 1952 [2021-06-05 07:08:59,611 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 07:08:59,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1609.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:08:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 07:08:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1241. [2021-06-05 07:08:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-06-05 07:08:59,628 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-06-05 07:08:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:59,628 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-06-05 07:08:59,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 07:08:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-06-05 07:08:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:08:59,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:59,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:08:59,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 07:08:59,830 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:59,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:59,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-06-05 07:08:59,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:59,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989979530] [2021-06-05 07:08:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:59,997 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 07:08:59,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:59,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989979530] [2021-06-05 07:08:59,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989979530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:59,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735767297] [2021-06-05 07:08:59,997 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 07:09:00,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:09:00,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:00,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:09:00,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:00,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:00,211 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 07:09:00,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:00,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:00,217 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 07:09:00,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-06-05 07:09:00,230 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 07:09:00,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735767297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:00,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:00,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:09:00,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202162727] [2021-06-05 07:09:00,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:00,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:00,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:00,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:00,231 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:09:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:01,107 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-06-05 07:09:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:09:01,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-06-05 07:09:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:01,109 INFO L225 Difference]: With dead ends: 1876 [2021-06-05 07:09:01,110 INFO L226 Difference]: Without dead ends: 1861 [2021-06-05 07:09:01,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:09:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-06-05 07:09:01,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-06-05 07:09:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-06-05 07:09:01,126 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-06-05 07:09:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:01,126 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-06-05 07:09:01,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:09:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-06-05 07:09:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:01,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:01,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:01,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:01,328 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-06-05 07:09:01,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:01,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831468004] [2021-06-05 07:09:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:01,486 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 07:09:01,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:01,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831468004] [2021-06-05 07:09:01,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831468004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:01,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005528617] [2021-06-05 07:09:01,487 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 07:09:01,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:01,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:01,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:09:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:01,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:01,638 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 07:09:01,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:01,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:01,643 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 07:09:01,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:09:01,660 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 07:09:01,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005528617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:01,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:01,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:09:01,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038452906] [2021-06-05 07:09:01,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:01,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:01,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:01,661 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 07:09:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:02,897 INFO L93 Difference]: Finished difference Result 2069 states and 6711 transitions. [2021-06-05 07:09:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:09:02,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 26 [2021-06-05 07:09:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:02,900 INFO L225 Difference]: With dead ends: 2069 [2021-06-05 07:09:02,900 INFO L226 Difference]: Without dead ends: 2054 [2021-06-05 07:09:02,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1041.2ms TimeCoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:09:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-06-05 07:09:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1246. [2021-06-05 07:09:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-05 07:09:02,918 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-05 07:09:02,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:02,918 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-05 07:09:02,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 07:09:02,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-05 07:09:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:02,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:02,920 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:03,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 07:09:03,120 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 11 times [2021-06-05 07:09:03,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:03,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514855035] [2021-06-05 07:09:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:03,282 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 07:09:03,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:03,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514855035] [2021-06-05 07:09:03,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514855035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:03,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384721028] [2021-06-05 07:09:03,283 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 07:09:03,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:09:03,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:03,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:09:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:03,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:03,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:03,492 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 07:09:03,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:03,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:03,497 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 07:09:03,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:09:03,516 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 07:09:03,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384721028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:03,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:03,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:09:03,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588408754] [2021-06-05 07:09:03,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:09:03,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:03,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:09:03,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:03,517 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 07:09:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:04,818 INFO L93 Difference]: Finished difference Result 1790 states and 5829 transitions. [2021-06-05 07:09:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:09:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 26 [2021-06-05 07:09:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:04,820 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 07:09:04,820 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 07:09:04,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1011.4ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:09:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 07:09:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1249. [2021-06-05 07:09:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.3621794871794872) internal successors, (4196), 1248 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4196 transitions. [2021-06-05 07:09:04,837 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4196 transitions. Word has length 26 [2021-06-05 07:09:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:04,837 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 4196 transitions. [2021-06-05 07:09:04,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 07:09:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4196 transitions. [2021-06-05 07:09:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:04,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:04,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:05,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 07:09:05,039 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:05,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1617260987, now seen corresponding path program 12 times [2021-06-05 07:09:05,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:05,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332408123] [2021-06-05 07:09:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:05,214 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 07:09:05,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332408123] [2021-06-05 07:09:05,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332408123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480842292] [2021-06-05 07:09:05,214 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 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 07:09:05,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:05,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:09:05,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:05,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:05,362 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 07:09:05,365 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:09:05,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:05,373 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 07:09:05,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:09:05,411 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 07:09:05,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480842292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:05,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:05,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:09:05,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011175610] [2021-06-05 07:09:05,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:05,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:05,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:05,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:05,412 INFO L87 Difference]: Start difference. First operand 1249 states and 4196 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:09:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:06,537 INFO L93 Difference]: Finished difference Result 2008 states and 6519 transitions. [2021-06-05 07:09:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:09:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:09:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:06,540 INFO L225 Difference]: With dead ends: 2008 [2021-06-05 07:09:06,540 INFO L226 Difference]: Without dead ends: 1993 [2021-06-05 07:09:06,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 894.4ms TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:09:06,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-06-05 07:09:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1246. [2021-06-05 07:09:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-05 07:09:06,558 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-05 07:09:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:06,558 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-05 07:09:06,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:09:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-05 07:09:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:06,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:06,560 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:06,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:06,764 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-06-05 07:09:06,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:06,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000449061] [2021-06-05 07:09:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:06,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:06,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000449061] [2021-06-05 07:09:06,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000449061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:06,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970989201] [2021-06-05 07:09:06,937 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 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 07:09:06,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:09:06,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:09:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:07,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:07,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:07,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:07,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:07,080 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 07:09:07,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:07,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:07,086 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 07:09:07,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:09:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:07,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970989201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:07,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:07,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:09:07,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204426697] [2021-06-05 07:09:07,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:07,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:07,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:07,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:07,106 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:08,821 INFO L93 Difference]: Finished difference Result 2877 states and 8904 transitions. [2021-06-05 07:09:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:09:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:09:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:08,825 INFO L225 Difference]: With dead ends: 2877 [2021-06-05 07:09:08,825 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 07:09:08,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1303.9ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:09:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 07:09:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1292. [2021-06-05 07:09:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-06-05 07:09:08,845 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-06-05 07:09:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:08,846 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-06-05 07:09:08,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-06-05 07:09:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:08,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:08,848 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:09,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 07:09:09,049 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-06-05 07:09:09,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:09,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141943268] [2021-06-05 07:09:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:09,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:09,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141943268] [2021-06-05 07:09:09,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141943268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:09,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502416143] [2021-06-05 07:09:09,237 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 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 07:09:09,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:09:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:09,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:09,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:09,380 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 07:09:09,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:09,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:09,386 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 07:09:09,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:09:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:09,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502416143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:09,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:09,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:09:09,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047450996] [2021-06-05 07:09:09,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:09,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:09,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:09,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:09,406 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:10,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:10,871 INFO L93 Difference]: Finished difference Result 2732 states and 8592 transitions. [2021-06-05 07:09:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:09:10,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:09:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:10,875 INFO L225 Difference]: With dead ends: 2732 [2021-06-05 07:09:10,875 INFO L226 Difference]: Without dead ends: 2687 [2021-06-05 07:09:10,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1213.9ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:09:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-06-05 07:09:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1288. [2021-06-05 07:09:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-06-05 07:09:10,894 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-06-05 07:09:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:10,895 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-06-05 07:09:10,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-06-05 07:09:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:10,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:10,897 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:11,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 07:09:11,098 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:11,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-06-05 07:09:11,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:11,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981027009] [2021-06-05 07:09:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:11,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:11,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981027009] [2021-06-05 07:09:11,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981027009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:11,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799734349] [2021-06-05 07:09:11,286 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:09:11,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:09:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:09:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:11,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:11,424 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 07:09:11,432 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:09:11,446 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-06-05 07:09:11,451 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 07:09:11,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:09:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:11,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799734349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:11,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:11,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:09:11,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274513044] [2021-06-05 07:09:11,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:11,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:11,495 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:13,348 INFO L93 Difference]: Finished difference Result 3013 states and 9417 transitions. [2021-06-05 07:09:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:09:13,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:09:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:13,352 INFO L225 Difference]: With dead ends: 3013 [2021-06-05 07:09:13,352 INFO L226 Difference]: Without dead ends: 2968 [2021-06-05 07:09:13,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1562.9ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:09:13,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-06-05 07:09:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 1292. [2021-06-05 07:09:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-06-05 07:09:13,373 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-06-05 07:09:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:13,373 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-06-05 07:09:13,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-06-05 07:09:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:13,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:13,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:13,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 07:09:13,576 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-06-05 07:09:13,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:13,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403556757] [2021-06-05 07:09:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:13,751 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 07:09:13,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:13,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403556757] [2021-06-05 07:09:13,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403556757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:13,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31456881] [2021-06-05 07:09:13,751 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 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 07:09:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:09:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:13,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:13,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:13,925 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 07:09:13,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:13,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:13,930 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 07:09:13,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:09:13,943 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 07:09:13,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31456881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:13,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:13,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:09:13,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844493330] [2021-06-05 07:09:13,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:13,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:13,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:13,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:13,944 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:09:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:14,321 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-06-05 07:09:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:09:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-06-05 07:09:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:14,324 INFO L225 Difference]: With dead ends: 1654 [2021-06-05 07:09:14,324 INFO L226 Difference]: Without dead ends: 1639 [2021-06-05 07:09:14,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:09:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-06-05 07:09:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-06-05 07:09:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-06-05 07:09:14,338 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-06-05 07:09:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:14,339 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-06-05 07:09:14,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:09:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-06-05 07:09:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:14,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:14,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:14,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:14,545 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-06-05 07:09:14,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:14,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333171486] [2021-06-05 07:09:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:14,723 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 07:09:14,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:14,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333171486] [2021-06-05 07:09:14,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333171486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:14,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164363926] [2021-06-05 07:09:14,724 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 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 07:09:14,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:14,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:14,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:09:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:14,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:14,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:14,906 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 07:09:14,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:09:14,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:14,934 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 07:09:14,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:100 [2021-06-05 07:09:15,062 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 07:09:15,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164363926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:15,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:15,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:09:15,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556890305] [2021-06-05 07:09:15,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:09:15,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:09:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:15,063 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 07:09:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:16,572 INFO L93 Difference]: Finished difference Result 2013 states and 6430 transitions. [2021-06-05 07:09:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:09:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 26 [2021-06-05 07:09:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:16,575 INFO L225 Difference]: With dead ends: 2013 [2021-06-05 07:09:16,575 INFO L226 Difference]: Without dead ends: 1983 [2021-06-05 07:09:16,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1245.5ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:09:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-05 07:09:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1297. [2021-06-05 07:09:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-05 07:09:16,593 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-05 07:09:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:16,593 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-05 07:09:16,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 07:09:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-05 07:09:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:16,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:16,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:16,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:16,795 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:16,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1363716195, now seen corresponding path program 15 times [2021-06-05 07:09:16,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:16,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79895561] [2021-06-05 07:09:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:16,974 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 07:09:16,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:16,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79895561] [2021-06-05 07:09:16,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79895561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:16,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190533589] [2021-06-05 07:09:16,974 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 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 07:09:16,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:09:16,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:09:17,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:17,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:17,154 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 07:09:17,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:09:17,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:17,176 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 07:09:17,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 07:09:17,253 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 07:09:17,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190533589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:17,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:17,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:09:17,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388235768] [2021-06-05 07:09:17,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:17,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:17,254 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:09:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:18,495 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-06-05 07:09:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:09:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 07:09:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:18,498 INFO L225 Difference]: With dead ends: 2000 [2021-06-05 07:09:18,498 INFO L226 Difference]: Without dead ends: 1985 [2021-06-05 07:09:18,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 985.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:09:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-06-05 07:09:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1289. [2021-06-05 07:09:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3944099378881987) internal successors, (4372), 1288 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4372 transitions. [2021-06-05 07:09:18,515 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4372 transitions. Word has length 26 [2021-06-05 07:09:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:18,515 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4372 transitions. [2021-06-05 07:09:18,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:09:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4372 transitions. [2021-06-05 07:09:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:18,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:18,517 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:18,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:18,733 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:18,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 16 times [2021-06-05 07:09:18,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:18,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374357907] [2021-06-05 07:09:18,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:18,904 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 07:09:18,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:18,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374357907] [2021-06-05 07:09:18,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374357907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:18,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340266099] [2021-06-05 07:09:18,904 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 07:09:18,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:18,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:18,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:09:18,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:19,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:19,078 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 07:09:19,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:19,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:19,083 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 07:09:19,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:09:19,100 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 07:09:19,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340266099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:19,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:19,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:09:19,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483032132] [2021-06-05 07:09:19,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:19,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:19,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:19,101 INFO L87 Difference]: Start difference. First operand 1289 states and 4372 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 07:09:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:20,060 INFO L93 Difference]: Finished difference Result 2049 states and 6731 transitions. [2021-06-05 07:09:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:09:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 26 [2021-06-05 07:09:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:20,063 INFO L225 Difference]: With dead ends: 2049 [2021-06-05 07:09:20,063 INFO L226 Difference]: Without dead ends: 2034 [2021-06-05 07:09:20,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:09:20,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-06-05 07:09:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1298. [2021-06-05 07:09:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.3939861218195837) internal successors, (4402), 1297 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4402 transitions. [2021-06-05 07:09:20,080 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4402 transitions. Word has length 26 [2021-06-05 07:09:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:20,080 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4402 transitions. [2021-06-05 07:09:20,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 07:09:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4402 transitions. [2021-06-05 07:09:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:20,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:20,082 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:20,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:20,284 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:20,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 17 times [2021-06-05 07:09:20,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:20,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292922941] [2021-06-05 07:09:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:20,462 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 07:09:20,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292922941] [2021-06-05 07:09:20,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292922941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944236256] [2021-06-05 07:09:20,463 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 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 07:09:20,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:09:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:20,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:09:20,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:20,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:20,655 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 07:09:20,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:20,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:20,660 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 07:09:20,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:09:20,674 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 07:09:20,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944236256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:20,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:20,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:09:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463071259] [2021-06-05 07:09:20,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:09:20,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:09:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:20,675 INFO L87 Difference]: Start difference. First operand 1298 states and 4402 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 07:09:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:21,545 INFO L93 Difference]: Finished difference Result 1774 states and 5862 transitions. [2021-06-05 07:09:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:09:21,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 26 [2021-06-05 07:09:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:21,547 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 07:09:21,547 INFO L226 Difference]: Without dead ends: 1759 [2021-06-05 07:09:21,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 774.0ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:09:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-06-05 07:09:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1301. [2021-06-05 07:09:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3953846153846152) internal successors, (4414), 1300 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4414 transitions. [2021-06-05 07:09:21,563 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4414 transitions. Word has length 26 [2021-06-05 07:09:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:21,564 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4414 transitions. [2021-06-05 07:09:21,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 07:09:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4414 transitions. [2021-06-05 07:09:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:21,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:21,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:21,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 07:09:21,766 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:21,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2108946275, now seen corresponding path program 18 times [2021-06-05 07:09:21,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:21,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969475806] [2021-06-05 07:09:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:21,945 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 07:09:21,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:21,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969475806] [2021-06-05 07:09:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969475806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:21,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571023268] [2021-06-05 07:09:21,945 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 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 07:09:21,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:21,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:09:21,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:22,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:22,094 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 07:09:22,096 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:09:22,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:22,105 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 07:09:22,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:09:22,141 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 07:09:22,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571023268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:22,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:22,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:09:22,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528411969] [2021-06-05 07:09:22,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:22,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:22,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:22,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:22,142 INFO L87 Difference]: Start difference. First operand 1301 states and 4414 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 07:09:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:23,013 INFO L93 Difference]: Finished difference Result 2057 states and 6754 transitions. [2021-06-05 07:09:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:09:23,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 26 [2021-06-05 07:09:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:23,016 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 07:09:23,016 INFO L226 Difference]: Without dead ends: 2042 [2021-06-05 07:09:23,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 799.0ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:09:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-06-05 07:09:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1295. [2021-06-05 07:09:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.39258114374034) internal successors, (4390), 1294 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4390 transitions. [2021-06-05 07:09:23,033 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4390 transitions. Word has length 26 [2021-06-05 07:09:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:23,033 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4390 transitions. [2021-06-05 07:09:23,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 07:09:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4390 transitions. [2021-06-05 07:09:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:23,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:23,035 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:23,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:23,236 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 19 times [2021-06-05 07:09:23,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:23,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373093962] [2021-06-05 07:09:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:23,429 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 07:09:23,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:23,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373093962] [2021-06-05 07:09:23,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373093962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:23,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872880600] [2021-06-05 07:09:23,429 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 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 07:09:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:23,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:09:23,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:23,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:23,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:23,605 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 07:09:23,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:23,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:23,610 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 07:09:23,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:09:23,623 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 07:09:23,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872880600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:23,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:23,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:09:23,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132750478] [2021-06-05 07:09:23,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:23,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:23,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:23,624 INFO L87 Difference]: Start difference. First operand 1295 states and 4390 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:09:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:24,055 INFO L93 Difference]: Finished difference Result 1746 states and 5752 transitions. [2021-06-05 07:09:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:09:24,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-06-05 07:09:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:24,058 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 07:09:24,058 INFO L226 Difference]: Without dead ends: 1725 [2021-06-05 07:09:24,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:09:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-06-05 07:09:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1336. [2021-06-05 07:09:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.3872659176029964) internal successors, (4522), 1335 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4522 transitions. [2021-06-05 07:09:24,073 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4522 transitions. Word has length 26 [2021-06-05 07:09:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:24,073 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4522 transitions. [2021-06-05 07:09:24,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 07:09:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4522 transitions. [2021-06-05 07:09:24,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:24,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:24,075 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:24,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:24,289 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 20 times [2021-06-05 07:09:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:24,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583188073] [2021-06-05 07:09:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:24,481 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 07:09:24,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:24,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583188073] [2021-06-05 07:09:24,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583188073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:24,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779037303] [2021-06-05 07:09:24,481 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 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 07:09:24,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:24,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:24,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:09:24,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:24,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:24,620 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 07:09:24,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:09:24,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:24,644 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 07:09:24,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 07:09:24,729 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 07:09:24,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779037303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:24,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:24,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:09:24,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910040896] [2021-06-05 07:09:24,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:24,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:24,730 INFO L87 Difference]: Start difference. First operand 1336 states and 4522 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:09:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:25,615 INFO L93 Difference]: Finished difference Result 2131 states and 6881 transitions. [2021-06-05 07:09:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:09:25,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 07:09:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:25,618 INFO L225 Difference]: With dead ends: 2131 [2021-06-05 07:09:25,618 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 07:09:25,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 814.9ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:09:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 07:09:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1348. [2021-06-05 07:09:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3919821826280625) internal successors, (4569), 1347 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4569 transitions. [2021-06-05 07:09:25,637 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4569 transitions. Word has length 26 [2021-06-05 07:09:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:25,637 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4569 transitions. [2021-06-05 07:09:25,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:09:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4569 transitions. [2021-06-05 07:09:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:25,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:25,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:25,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:25,853 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:25,853 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 21 times [2021-06-05 07:09:25,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:25,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432554808] [2021-06-05 07:09:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:26,030 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 07:09:26,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432554808] [2021-06-05 07:09:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432554808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185530448] [2021-06-05 07:09:26,030 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 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 07:09:26,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:09:26,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:26,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:09:26,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:26,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:26,170 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 07:09:26,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:09:26,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:26,190 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 07:09:26,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 07:09:26,274 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 07:09:26,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185530448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:26,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:26,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:09:26,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061057206] [2021-06-05 07:09:26,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:26,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:26,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:26,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:26,275 INFO L87 Difference]: Start difference. First operand 1348 states and 4569 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:09:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:27,019 INFO L93 Difference]: Finished difference Result 1900 states and 6269 transitions. [2021-06-05 07:09:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:09:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 07:09:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:27,022 INFO L225 Difference]: With dead ends: 1900 [2021-06-05 07:09:27,022 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 07:09:27,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 713.1ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:09:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 07:09:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1361. [2021-06-05 07:09:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.398529411764706) internal successors, (4622), 1360 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 07:09:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4622 transitions. [2021-06-05 07:09:27,038 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4622 transitions. Word has length 26 [2021-06-05 07:09:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:27,038 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4622 transitions. [2021-06-05 07:09:27,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:09:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4622 transitions. [2021-06-05 07:09:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:27,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:27,040 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:27,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:27,241 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 22 times [2021-06-05 07:09:27,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:27,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45428819] [2021-06-05 07:09:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:27,406 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 07:09:27,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:27,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45428819] [2021-06-05 07:09:27,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45428819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:27,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255244593] [2021-06-05 07:09:27,407 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 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 07:09:27,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:27,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:27,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:09:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:27,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:27,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:27,572 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 07:09:27,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:27,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:27,578 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 07:09:27,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:09:27,595 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 07:09:27,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255244593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:27,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:27,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:09:27,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218480598] [2021-06-05 07:09:27,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:27,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:27,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:27,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:27,595 INFO L87 Difference]: Start difference. First operand 1361 states and 4622 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 07:09:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:27,995 INFO L93 Difference]: Finished difference Result 1726 states and 5748 transitions. [2021-06-05 07:09:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:09:27,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:09:27,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:27,997 INFO L225 Difference]: With dead ends: 1726 [2021-06-05 07:09:27,997 INFO L226 Difference]: Without dead ends: 1711 [2021-06-05 07:09:27,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:09:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-05 07:09:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1372. [2021-06-05 07:09:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.3982494529540483) internal successors, (4659), 1371 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4659 transitions. [2021-06-05 07:09:28,013 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4659 transitions. Word has length 26 [2021-06-05 07:09:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:28,013 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4659 transitions. [2021-06-05 07:09:28,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 07:09:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4659 transitions. [2021-06-05 07:09:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:28,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:28,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:28,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 07:09:28,216 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 23 times [2021-06-05 07:09:28,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:28,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456831849] [2021-06-05 07:09:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:28,389 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 07:09:28,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456831849] [2021-06-05 07:09:28,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456831849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016844094] [2021-06-05 07:09:28,389 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 07:09:28,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:09:28,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:09:28,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:28,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:28,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:28,569 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 07:09:28,570 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:09:28,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:28,579 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 07:09:28,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 07:09:28,621 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 07:09:28,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016844094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:28,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:28,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:09:28,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847491545] [2021-06-05 07:09:28,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:09:28,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:28,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:09:28,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:28,622 INFO L87 Difference]: Start difference. First operand 1372 states and 4659 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 07:09:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:29,437 INFO L93 Difference]: Finished difference Result 2060 states and 6782 transitions. [2021-06-05 07:09:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:09:29,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 07:09:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:29,439 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 07:09:29,439 INFO L226 Difference]: Without dead ends: 2041 [2021-06-05 07:09:29,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 735.2ms TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:09:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-05 07:09:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1373. [2021-06-05 07:09:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.401603498542274) internal successors, (4667), 1372 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:29,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4667 transitions. [2021-06-05 07:09:29,458 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4667 transitions. Word has length 26 [2021-06-05 07:09:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:29,458 INFO L482 AbstractCegarLoop]: Abstraction has 1373 states and 4667 transitions. [2021-06-05 07:09:29,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 07:09:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4667 transitions. [2021-06-05 07:09:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:29,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:29,460 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:29,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:29,661 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 24 times [2021-06-05 07:09:29,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:29,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438919665] [2021-06-05 07:09:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:29,827 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 07:09:29,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:29,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438919665] [2021-06-05 07:09:29,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438919665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:29,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240804032] [2021-06-05 07:09:29,828 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 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 07:09:29,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:29,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:29,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:09:29,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:29,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:29,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:29,968 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 07:09:29,969 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:09:29,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:29,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:29,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 07:09:30,012 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 07:09:30,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240804032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:30,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:30,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:09:30,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150382537] [2021-06-05 07:09:30,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:30,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:30,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:30,013 INFO L87 Difference]: Start difference. First operand 1373 states and 4667 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:09:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:30,690 INFO L93 Difference]: Finished difference Result 1917 states and 6334 transitions. [2021-06-05 07:09:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:09:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-06-05 07:09:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:30,693 INFO L225 Difference]: With dead ends: 1917 [2021-06-05 07:09:30,693 INFO L226 Difference]: Without dead ends: 1892 [2021-06-05 07:09:30,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 622.3ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:09:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-06-05 07:09:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1379. [2021-06-05 07:09:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.399854862119013) internal successors, (4685), 1378 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4685 transitions. [2021-06-05 07:09:30,710 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4685 transitions. Word has length 26 [2021-06-05 07:09:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:30,710 INFO L482 AbstractCegarLoop]: Abstraction has 1379 states and 4685 transitions. [2021-06-05 07:09:30,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:09:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4685 transitions. [2021-06-05 07:09:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:30,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:30,712 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:30,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:30,912 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:30,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-06-05 07:09:30,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:30,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923499766] [2021-06-05 07:09:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:31,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:31,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923499766] [2021-06-05 07:09:31,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923499766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:31,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257248345] [2021-06-05 07:09:31,109 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 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 07:09:31,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:31,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:31,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:09:31,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:31,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:31,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:31,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:31,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:31,238 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 07:09:31,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:31,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:31,242 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 07:09:31,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:09:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:31,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257248345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:31,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:31,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:09:31,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447793313] [2021-06-05 07:09:31,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:31,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:31,255 INFO L87 Difference]: Start difference. First operand 1379 states and 4685 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:09:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:32,003 INFO L93 Difference]: Finished difference Result 1799 states and 5934 transitions. [2021-06-05 07:09:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:09:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 07:09:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:32,005 INFO L225 Difference]: With dead ends: 1799 [2021-06-05 07:09:32,005 INFO L226 Difference]: Without dead ends: 1773 [2021-06-05 07:09:32,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 689.7ms TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:09:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-06-05 07:09:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1391. [2021-06-05 07:09:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-06-05 07:09:32,021 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-06-05 07:09:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:32,021 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-06-05 07:09:32,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:09:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-06-05 07:09:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:32,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:32,023 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:32,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:32,223 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-06-05 07:09:32,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:32,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149515039] [2021-06-05 07:09:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:32,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:32,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149515039] [2021-06-05 07:09:32,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149515039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:32,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915203977] [2021-06-05 07:09:32,441 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 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 07:09:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:09:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:32,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:32,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:32,575 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 07:09:32,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:32,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:32,580 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 07:09:32,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:09:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:32,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915203977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:32,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:32,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:09:32,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328569776] [2021-06-05 07:09:32,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:32,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:32,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:32,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:32,598 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:09:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:33,622 INFO L93 Difference]: Finished difference Result 1991 states and 6577 transitions. [2021-06-05 07:09:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:09:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 07:09:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:33,625 INFO L225 Difference]: With dead ends: 1991 [2021-06-05 07:09:33,625 INFO L226 Difference]: Without dead ends: 1976 [2021-06-05 07:09:33,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 920.3ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:09:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-05 07:09:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1391. [2021-06-05 07:09:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-06-05 07:09:33,642 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-06-05 07:09:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:33,642 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-06-05 07:09:33,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:09:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-06-05 07:09:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:33,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:33,643 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:33,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:33,844 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:33,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 25 times [2021-06-05 07:09:33,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:33,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648600549] [2021-06-05 07:09:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:34,015 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 07:09:34,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:34,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648600549] [2021-06-05 07:09:34,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648600549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:34,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874000001] [2021-06-05 07:09:34,016 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 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 07:09:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:09:34,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:34,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:34,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:34,164 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 07:09:34,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:34,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:34,169 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 07:09:34,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:09:34,184 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 07:09:34,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874000001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:34,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:34,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:09:34,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248926546] [2021-06-05 07:09:34,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:34,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:34,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:34,185 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 07:09:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:34,795 INFO L93 Difference]: Finished difference Result 1897 states and 6187 transitions. [2021-06-05 07:09:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:09:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:09:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:34,798 INFO L225 Difference]: With dead ends: 1897 [2021-06-05 07:09:34,798 INFO L226 Difference]: Without dead ends: 1882 [2021-06-05 07:09:34,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:09:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-06-05 07:09:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1402. [2021-06-05 07:09:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.3954318344039973) internal successors, (4757), 1401 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4757 transitions. [2021-06-05 07:09:34,814 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4757 transitions. Word has length 26 [2021-06-05 07:09:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:34,814 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4757 transitions. [2021-06-05 07:09:34,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 07:09:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4757 transitions. [2021-06-05 07:09:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:34,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:34,816 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:35,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 07:09:35,016 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-06-05 07:09:35,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:35,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074181265] [2021-06-05 07:09:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:35,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:35,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074181265] [2021-06-05 07:09:35,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074181265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:35,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151118793] [2021-06-05 07:09:35,232 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 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 07:09:35,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:35,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:09:35,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:35,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:35,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:35,407 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 07:09:35,413 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:09:35,426 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 07:09:35,428 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 07:09:35,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2021-06-05 07:09:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:35,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151118793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:35,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:35,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 07:09:35,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288213867] [2021-06-05 07:09:35,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:09:35,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:35,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:09:35,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:09:35,462 INFO L87 Difference]: Start difference. First operand 1402 states and 4757 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 07:09:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:37,100 INFO L93 Difference]: Finished difference Result 2292 states and 7266 transitions. [2021-06-05 07:09:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:09:37,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 26 [2021-06-05 07:09:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:37,103 INFO L225 Difference]: With dead ends: 2292 [2021-06-05 07:09:37,103 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 07:09:37,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1427.0ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:09:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 07:09:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1409. [2021-06-05 07:09:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3963068181818183) internal successors, (4782), 1408 states have internal predecessors, (4782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4782 transitions. [2021-06-05 07:09:37,127 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4782 transitions. Word has length 26 [2021-06-05 07:09:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:37,127 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4782 transitions. [2021-06-05 07:09:37,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 07:09:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4782 transitions. [2021-06-05 07:09:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:37,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:37,129 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:37,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 07:09:37,330 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:37,330 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-06-05 07:09:37,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:37,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017603095] [2021-06-05 07:09:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:37,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017603095] [2021-06-05 07:09:37,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017603095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698521352] [2021-06-05 07:09:37,505 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 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 07:09:37,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:09:37,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:37,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:09:37,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:37,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:37,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:37,697 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 07:09:37,704 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:09:37,720 INFO L628 ElimStorePlain]: treesize reduction 15, result has 60.5 percent of original size [2021-06-05 07:09:37,722 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 07:09:37,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:35 [2021-06-05 07:09:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:37,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698521352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:37,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:37,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 07:09:37,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46042057] [2021-06-05 07:09:37,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:09:37,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:37,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:09:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:09:37,772 INFO L87 Difference]: Start difference. First operand 1409 states and 4782 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 07:09:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:39,109 INFO L93 Difference]: Finished difference Result 2493 states and 8039 transitions. [2021-06-05 07:09:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:09:39,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 26 [2021-06-05 07:09:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:39,112 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 07:09:39,112 INFO L226 Difference]: Without dead ends: 2478 [2021-06-05 07:09:39,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:09:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-06-05 07:09:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1419. [2021-06-05 07:09:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3970380818053596) internal successors, (4817), 1418 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4817 transitions. [2021-06-05 07:09:39,131 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4817 transitions. Word has length 26 [2021-06-05 07:09:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:39,131 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4817 transitions. [2021-06-05 07:09:39,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 07:09:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4817 transitions. [2021-06-05 07:09:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:39,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:39,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:39,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:39,334 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:39,334 INFO L82 PathProgramCache]: Analyzing trace with hash 558815383, now seen corresponding path program 26 times [2021-06-05 07:09:39,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:39,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007585957] [2021-06-05 07:09:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:39,496 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 07:09:39,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:39,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007585957] [2021-06-05 07:09:39,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007585957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:39,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413643709] [2021-06-05 07:09:39,497 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 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 07:09:39,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:39,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:39,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:09:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:39,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:39,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:39,667 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 07:09:39,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:09:39,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:39,688 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 07:09:39,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:105 [2021-06-05 07:09:39,798 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 07:09:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413643709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:39,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:39,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:09:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975375135] [2021-06-05 07:09:39,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:09:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:39,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:09:39,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:39,799 INFO L87 Difference]: Start difference. First operand 1419 states and 4817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 07:09:41,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:41,667 INFO L93 Difference]: Finished difference Result 2315 states and 7376 transitions. [2021-06-05 07:09:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:09:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-06-05 07:09:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:41,670 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 07:09:41,670 INFO L226 Difference]: Without dead ends: 2281 [2021-06-05 07:09:41,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1543.9ms TimeCoverageRelationStatistics Valid=399, Invalid=1953, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:09:41,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-06-05 07:09:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1435. [2021-06-05 07:09:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.406555090655509) internal successors, (4885), 1434 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4885 transitions. [2021-06-05 07:09:41,689 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4885 transitions. Word has length 26 [2021-06-05 07:09:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:41,689 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4885 transitions. [2021-06-05 07:09:41,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 07:09:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4885 transitions. [2021-06-05 07:09:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:41,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:41,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:41,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:41,905 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 27 times [2021-06-05 07:09:41,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:41,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761398412] [2021-06-05 07:09:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:42,034 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 07:09:42,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:42,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761398412] [2021-06-05 07:09:42,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761398412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:42,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782922556] [2021-06-05 07:09:42,035 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 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 07:09:42,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:09:42,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:09:42,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:42,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:42,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:42,187 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 07:09:42,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:09:42,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:42,214 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 07:09:42,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:65 [2021-06-05 07:09:42,291 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 07:09:42,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782922556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:42,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:42,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:09:42,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564725890] [2021-06-05 07:09:42,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:42,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:42,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:42,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:42,292 INFO L87 Difference]: Start difference. First operand 1435 states and 4885 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:09:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:43,401 INFO L93 Difference]: Finished difference Result 2365 states and 7650 transitions. [2021-06-05 07:09:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:09:43,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:09:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:43,405 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 07:09:43,405 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 07:09:43,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 826.3ms TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:09:43,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 07:09:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1429. [2021-06-05 07:09:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.40406162464986) internal successors, (4861), 1428 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4861 transitions. [2021-06-05 07:09:43,426 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4861 transitions. Word has length 26 [2021-06-05 07:09:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:43,426 INFO L482 AbstractCegarLoop]: Abstraction has 1429 states and 4861 transitions. [2021-06-05 07:09:43,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:09:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4861 transitions. [2021-06-05 07:09:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:43,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:43,427 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:43,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:43,628 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-06-05 07:09:43,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:43,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782650132] [2021-06-05 07:09:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:43,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:43,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782650132] [2021-06-05 07:09:43,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782650132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:43,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775972063] [2021-06-05 07:09:43,792 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 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 07:09:43,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:43,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:43,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:09:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:43,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:43,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:43,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:43,925 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 07:09:43,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:43,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:43,929 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 07:09:43,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:09:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:43,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775972063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:43,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:43,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:09:43,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88054030] [2021-06-05 07:09:43,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:43,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:43,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:43,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:43,947 INFO L87 Difference]: Start difference. First operand 1429 states and 4861 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:45,296 INFO L93 Difference]: Finished difference Result 3028 states and 9674 transitions. [2021-06-05 07:09:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:09:45,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:09:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:45,300 INFO L225 Difference]: With dead ends: 3028 [2021-06-05 07:09:45,300 INFO L226 Difference]: Without dead ends: 2992 [2021-06-05 07:09:45,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1085.1ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:09:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-06-05 07:09:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1562. [2021-06-05 07:09:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.42152466367713) internal successors, (5341), 1561 states have internal predecessors, (5341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5341 transitions. [2021-06-05 07:09:45,324 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5341 transitions. Word has length 26 [2021-06-05 07:09:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:45,324 INFO L482 AbstractCegarLoop]: Abstraction has 1562 states and 5341 transitions. [2021-06-05 07:09:45,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5341 transitions. [2021-06-05 07:09:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:45,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:45,326 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:45,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:45,527 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:45,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-06-05 07:09:45,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:45,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802678268] [2021-06-05 07:09:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:45,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:45,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802678268] [2021-06-05 07:09:45,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802678268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:45,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831264564] [2021-06-05 07:09:45,690 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 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 07:09:45,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:09:45,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:45,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:09:45,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:45,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:45,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:45,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:45,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 07:09:45,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:09:45,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:45,823 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 07:09:45,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:09:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:45,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831264564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:45,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:45,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:09:45,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70908617] [2021-06-05 07:09:45,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:09:45,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:45,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:09:45,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:09:45,860 INFO L87 Difference]: Start difference. First operand 1562 states and 5341 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:47,483 INFO L93 Difference]: Finished difference Result 3412 states and 10776 transitions. [2021-06-05 07:09:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:09:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 07:09:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:47,487 INFO L225 Difference]: With dead ends: 3412 [2021-06-05 07:09:47,487 INFO L226 Difference]: Without dead ends: 3355 [2021-06-05 07:09:47,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1343.8ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:09:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2021-06-05 07:09:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 1585. [2021-06-05 07:09:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.4242424242424243) internal successors, (5424), 1584 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5424 transitions. [2021-06-05 07:09:47,513 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5424 transitions. Word has length 26 [2021-06-05 07:09:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:47,513 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5424 transitions. [2021-06-05 07:09:47,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 07:09:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5424 transitions. [2021-06-05 07:09:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:47,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:47,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:47,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 07:09:47,715 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:47,716 INFO L82 PathProgramCache]: Analyzing trace with hash 701456227, now seen corresponding path program 28 times [2021-06-05 07:09:47,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:47,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65758380] [2021-06-05 07:09:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:47,870 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 07:09:47,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:47,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65758380] [2021-06-05 07:09:47,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65758380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:47,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499995075] [2021-06-05 07:09:47,871 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 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 07:09:47,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:47,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:47,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:09:47,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:48,063 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 07:09:48,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:48,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:48,067 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 07:09:48,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:09:48,083 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 07:09:48,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499995075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:48,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:48,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:09:48,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927712024] [2021-06-05 07:09:48,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:48,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:48,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:48,084 INFO L87 Difference]: Start difference. First operand 1585 states and 5424 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 07:09:48,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:48,663 INFO L93 Difference]: Finished difference Result 2011 states and 6730 transitions. [2021-06-05 07:09:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:09:48,663 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 07:09:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:48,666 INFO L225 Difference]: With dead ends: 2011 [2021-06-05 07:09:48,666 INFO L226 Difference]: Without dead ends: 1996 [2021-06-05 07:09:48,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:09:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-06-05 07:09:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1593. [2021-06-05 07:09:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.423994974874372) internal successors, (5451), 1592 states have internal predecessors, (5451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5451 transitions. [2021-06-05 07:09:48,684 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5451 transitions. Word has length 26 [2021-06-05 07:09:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:48,684 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5451 transitions. [2021-06-05 07:09:48,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 07:09:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5451 transitions. [2021-06-05 07:09:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:48,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:48,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:48,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 07:09:48,887 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:48,887 INFO L82 PathProgramCache]: Analyzing trace with hash -916076553, now seen corresponding path program 29 times [2021-06-05 07:09:48,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:48,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263487317] [2021-06-05 07:09:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:49,011 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 07:09:49,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:49,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263487317] [2021-06-05 07:09:49,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263487317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:49,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546219396] [2021-06-05 07:09:49,012 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 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 07:09:49,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:09:49,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:09:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:49,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:49,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:49,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 07:09:49,189 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:09:49,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:49,197 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 07:09:49,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 07:09:49,232 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 07:09:49,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546219396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:49,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:49,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:09:49,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486076058] [2021-06-05 07:09:49,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:09:49,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:49,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:09:49,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:49,233 INFO L87 Difference]: Start difference. First operand 1593 states and 5451 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 07:09:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:50,039 INFO L93 Difference]: Finished difference Result 2467 states and 8081 transitions. [2021-06-05 07:09:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:09:50,039 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 07:09:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:50,042 INFO L225 Difference]: With dead ends: 2467 [2021-06-05 07:09:50,042 INFO L226 Difference]: Without dead ends: 2448 [2021-06-05 07:09:50,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 663.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:09:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-06-05 07:09:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 1588. [2021-06-05 07:09:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.421550094517958) internal successors, (5430), 1587 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5430 transitions. [2021-06-05 07:09:50,064 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5430 transitions. Word has length 26 [2021-06-05 07:09:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:50,064 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5430 transitions. [2021-06-05 07:09:50,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 07:09:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5430 transitions. [2021-06-05 07:09:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:50,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:50,066 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:09:50,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 07:09:50,281 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:50,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 30 times [2021-06-05 07:09:50,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:50,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754855241] [2021-06-05 07:09:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:50,405 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 07:09:50,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754855241] [2021-06-05 07:09:50,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754855241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976497716] [2021-06-05 07:09:50,405 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 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 07:09:50,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:09:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:50,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:50,565 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 07:09:50,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:09:50,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:50,585 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 07:09:50,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:89 [2021-06-05 07:09:50,681 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 07:09:50,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976497716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:50,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:50,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:09:50,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753955616] [2021-06-05 07:09:50,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:09:50,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:09:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:50,682 INFO L87 Difference]: Start difference. First operand 1588 states and 5430 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 07:09:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:52,251 INFO L93 Difference]: Finished difference Result 2521 states and 8150 transitions. [2021-06-05 07:09:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:09:52,251 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-06-05 07:09:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:52,254 INFO L225 Difference]: With dead ends: 2521 [2021-06-05 07:09:52,254 INFO L226 Difference]: Without dead ends: 2452 [2021-06-05 07:09:52,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1299.1ms TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:09:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-05 07:09:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1576. [2021-06-05 07:09:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.420952380952381) internal successors, (5388), 1575 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5388 transitions. [2021-06-05 07:09:52,275 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5388 transitions. Word has length 26 [2021-06-05 07:09:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:52,275 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5388 transitions. [2021-06-05 07:09:52,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 07:09:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5388 transitions. [2021-06-05 07:09:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:52,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:52,277 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:52,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 07:09:52,478 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:52,478 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-06-05 07:09:52,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:52,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075147335] [2021-06-05 07:09:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:52,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:52,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075147335] [2021-06-05 07:09:52,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075147335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:52,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978858396] [2021-06-05 07:09:52,712 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 07:09:52,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:09:52,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:52,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:09:52,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:52,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:52,860 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 07:09:52,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:52,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:52,865 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 07:09:52,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:09:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:52,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978858396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:52,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:52,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:09:52,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452452953] [2021-06-05 07:09:52,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:52,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:52,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:52,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:52,879 INFO L87 Difference]: Start difference. First operand 1576 states and 5388 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:09:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:53,771 INFO L93 Difference]: Finished difference Result 2032 states and 6722 transitions. [2021-06-05 07:09:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:09:53,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 07:09:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:53,773 INFO L225 Difference]: With dead ends: 2032 [2021-06-05 07:09:53,773 INFO L226 Difference]: Without dead ends: 2010 [2021-06-05 07:09:53,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 844.8ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:09:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-06-05 07:09:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1568. [2021-06-05 07:09:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-06-05 07:09:53,791 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-06-05 07:09:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:53,791 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-06-05 07:09:53,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:09:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-06-05 07:09:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:53,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:53,793 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:53,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 07:09:53,993 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:53,994 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-06-05 07:09:53,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:53,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086784284] [2021-06-05 07:09:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:54,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:54,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086784284] [2021-06-05 07:09:54,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086784284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:54,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019256310] [2021-06-05 07:09:54,212 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 07:09:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:54,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:09:54,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:54,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:54,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:54,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:09:54,356 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 07:09:54,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:54,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:54,361 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 07:09:54,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:09:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:54,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019256310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:54,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:54,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:09:54,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373327951] [2021-06-05 07:09:54,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:09:54,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:54,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:09:54,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:09:54,379 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:09:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:55,555 INFO L93 Difference]: Finished difference Result 2234 states and 7397 transitions. [2021-06-05 07:09:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:09:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 07:09:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:55,558 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 07:09:55,558 INFO L226 Difference]: Without dead ends: 2219 [2021-06-05 07:09:55,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1034.2ms TimeCoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:09:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-06-05 07:09:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1568. [2021-06-05 07:09:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-06-05 07:09:55,576 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-06-05 07:09:55,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:55,576 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-06-05 07:09:55,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:09:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-06-05 07:09:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:55,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:55,578 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:55,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 07:09:55,779 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:55,779 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-06-05 07:09:55,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:55,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219655473] [2021-06-05 07:09:55,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:55,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:55,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219655473] [2021-06-05 07:09:55,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219655473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:55,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792481595] [2021-06-05 07:09:55,960 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 07:09:55,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:55,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:09:55,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:56,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:56,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:56,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:09:56,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:56,106 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 07:09:56,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:09:56,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:56,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:56,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 07:09:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:56,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792481595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:56,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:56,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-05 07:09:56,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295191054] [2021-06-05 07:09:56,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:09:56,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:56,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:09:56,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:09:56,159 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 07:09:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:59,507 INFO L93 Difference]: Finished difference Result 2979 states and 9505 transitions. [2021-06-05 07:09:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 07:09:59,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 26 [2021-06-05 07:09:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:59,511 INFO L225 Difference]: With dead ends: 2979 [2021-06-05 07:09:59,511 INFO L226 Difference]: Without dead ends: 2932 [2021-06-05 07:09:59,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 2810.2ms TimeCoverageRelationStatistics Valid=1084, Invalid=6056, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:09:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-06-05 07:09:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1584. [2021-06-05 07:09:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.4112444725205306) internal successors, (5400), 1583 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5400 transitions. [2021-06-05 07:09:59,534 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5400 transitions. Word has length 26 [2021-06-05 07:09:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:59,534 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5400 transitions. [2021-06-05 07:09:59,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 07:09:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5400 transitions. [2021-06-05 07:09:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:09:59,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:59,536 INFO L521 BasicCegarLoop]: trace histogram [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 07:09:59,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 07:09:59,737 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:59,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-06-05 07:09:59,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:59,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695281516] [2021-06-05 07:09:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:59,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:59,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695281516] [2021-06-05 07:09:59,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695281516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:59,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790321411] [2021-06-05 07:09:59,924 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 07:09:59,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:09:59,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 07:09:59,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:00,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:00,129 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-06-05 07:10:00,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:10:00,260 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 07:10:00,260 INFO L628 ElimStorePlain]: treesize reduction 66, result has 54.8 percent of original size [2021-06-05 07:10:00,268 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 07:10:00,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:214 [2021-06-05 07:10:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:00,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790321411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:00,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:00,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 07:10:00,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086978238] [2021-06-05 07:10:00,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:10:00,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:00,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:10:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:10:00,545 INFO L87 Difference]: Start difference. First operand 1584 states and 5400 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 07:10:01,754 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-05 07:10:02,128 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-05 07:10:02,317 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 07:10:02,615 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-06-05 07:10:02,834 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 07:10:02,975 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2021-06-05 07:10:03,221 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-06-05 07:10:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:03,283 INFO L93 Difference]: Finished difference Result 2665 states and 8672 transitions. [2021-06-05 07:10:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:10:03,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 26 [2021-06-05 07:10:03,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:03,293 INFO L225 Difference]: With dead ends: 2665 [2021-06-05 07:10:03,293 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 07:10:03,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2572.5ms TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:10:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 07:10:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1595. [2021-06-05 07:10:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.417189460476788) internal successors, (5447), 1594 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5447 transitions. [2021-06-05 07:10:03,316 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5447 transitions. Word has length 26 [2021-06-05 07:10:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:03,316 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5447 transitions. [2021-06-05 07:10:03,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 07:10:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5447 transitions. [2021-06-05 07:10:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:03,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:03,318 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:03,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:03,518 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-06-05 07:10:03,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:03,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671604199] [2021-06-05 07:10:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:03,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:03,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671604199] [2021-06-05 07:10:03,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671604199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:03,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272485686] [2021-06-05 07:10:03,740 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 07:10:03,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:03,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:03,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:03,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:03,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:03,879 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 07:10:03,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:03,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:03,884 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 07:10:03,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:10:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:03,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272485686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:03,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:03,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:10:03,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033895281] [2021-06-05 07:10:03,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:03,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:03,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:03,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:03,900 INFO L87 Difference]: Start difference. First operand 1595 states and 5447 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 07:10:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:05,173 INFO L93 Difference]: Finished difference Result 2141 states and 7071 transitions. [2021-06-05 07:10:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:10:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 07:10:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:05,176 INFO L225 Difference]: With dead ends: 2141 [2021-06-05 07:10:05,176 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 07:10:05,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1087.0ms TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 07:10:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1599. [2021-06-05 07:10:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-06-05 07:10:05,195 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-06-05 07:10:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:05,195 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-06-05 07:10:05,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 07:10:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-06-05 07:10:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:05,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:05,198 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:05,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 07:10:05,414 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:05,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:05,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-06-05 07:10:05,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:05,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386313024] [2021-06-05 07:10:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:05,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386313024] [2021-06-05 07:10:05,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386313024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105255109] [2021-06-05 07:10:05,677 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 07:10:05,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:10:05,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:05,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:05,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:05,889 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 07:10:05,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:10:05,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:05,903 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 07:10:05,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 07:10:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:05,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105255109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:05,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:05,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 07:10:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606123951] [2021-06-05 07:10:05,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:10:05,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:05,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:10:05,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:10:05,959 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 07:10:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:07,003 INFO L93 Difference]: Finished difference Result 2310 states and 7701 transitions. [2021-06-05 07:10:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:10:07,003 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 26 [2021-06-05 07:10:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:07,006 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 07:10:07,006 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 07:10:07,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 933.4ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:10:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 07:10:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1599. [2021-06-05 07:10:07,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-06-05 07:10:07,027 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-06-05 07:10:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:07,027 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-06-05 07:10:07,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 07:10:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-06-05 07:10:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:07,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:07,029 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:07,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 07:10:07,229 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:07,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-06-05 07:10:07,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:07,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870445434] [2021-06-05 07:10:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:07,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:07,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870445434] [2021-06-05 07:10:07,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870445434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:07,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302442437] [2021-06-05 07:10:07,480 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 07:10:07,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:10:07,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:07,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:10:07,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:07,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:07,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:07,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:07,624 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 07:10:07,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:10:07,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:07,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:07,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-05 07:10:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:07,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302442437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:07,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:07,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 07:10:07,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041693768] [2021-06-05 07:10:07,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:07,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:07,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:07,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:07,676 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 07:10:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:09,776 INFO L93 Difference]: Finished difference Result 2882 states and 9198 transitions. [2021-06-05 07:10:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:10:09,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-06-05 07:10:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:09,780 INFO L225 Difference]: With dead ends: 2882 [2021-06-05 07:10:09,780 INFO L226 Difference]: Without dead ends: 2848 [2021-06-05 07:10:09,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1903.3ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:10:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-06-05 07:10:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1599. [2021-06-05 07:10:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4198998748435545) internal successors, (5465), 1598 states have internal predecessors, (5465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5465 transitions. [2021-06-05 07:10:09,811 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5465 transitions. Word has length 26 [2021-06-05 07:10:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:09,811 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5465 transitions. [2021-06-05 07:10:09,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 07:10:09,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5465 transitions. [2021-06-05 07:10:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:09,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:09,813 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:10,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 07:10:10,013 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:10,014 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 31 times [2021-06-05 07:10:10,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:10,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227640006] [2021-06-05 07:10:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:10,151 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 07:10:10,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:10,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227640006] [2021-06-05 07:10:10,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227640006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:10,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643705328] [2021-06-05 07:10:10,152 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 07:10:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:10,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:10:10,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:10,298 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 07:10:10,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:10,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:10,302 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 07:10:10,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:10:10,319 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 07:10:10,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643705328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:10,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:10,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:10:10,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521441537] [2021-06-05 07:10:10,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:10,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:10,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:10,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:10,320 INFO L87 Difference]: Start difference. First operand 1599 states and 5465 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 07:10:11,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:11,331 INFO L93 Difference]: Finished difference Result 2462 states and 8155 transitions. [2021-06-05 07:10:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:10:11,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 26 [2021-06-05 07:10:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:11,335 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 07:10:11,335 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 07:10:11,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 822.9ms TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:10:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 07:10:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1590. [2021-06-05 07:10:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.416614222781624) internal successors, (5429), 1589 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5429 transitions. [2021-06-05 07:10:11,356 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5429 transitions. Word has length 26 [2021-06-05 07:10:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:11,356 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5429 transitions. [2021-06-05 07:10:11,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 07:10:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5429 transitions. [2021-06-05 07:10:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:11,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:11,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:11,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:11,559 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:11,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:11,559 INFO L82 PathProgramCache]: Analyzing trace with hash -107626611, now seen corresponding path program 32 times [2021-06-05 07:10:11,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:11,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597187130] [2021-06-05 07:10:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:11,714 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 07:10:11,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:11,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597187130] [2021-06-05 07:10:11,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597187130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:11,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038883656] [2021-06-05 07:10:11,715 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 07:10:11,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:11,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:11,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:11,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:11,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:11,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:11,862 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 07:10:11,863 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:10:11,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:11,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:11,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 07:10:11,903 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 07:10:11,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038883656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:11,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:11,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:10:11,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13603937] [2021-06-05 07:10:11,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:11,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:11,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:11,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:11,904 INFO L87 Difference]: Start difference. First operand 1590 states and 5429 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:12,877 INFO L93 Difference]: Finished difference Result 2279 states and 7572 transitions. [2021-06-05 07:10:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:10:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 07:10:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:12,880 INFO L225 Difference]: With dead ends: 2279 [2021-06-05 07:10:12,880 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 07:10:12,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 822.2ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:10:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 07:10:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1583. [2021-06-05 07:10:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4140328697850824) internal successors, (5401), 1582 states have internal predecessors, (5401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5401 transitions. [2021-06-05 07:10:12,901 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5401 transitions. Word has length 26 [2021-06-05 07:10:12,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:12,901 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5401 transitions. [2021-06-05 07:10:12,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:12,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5401 transitions. [2021-06-05 07:10:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:12,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:12,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:13,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:13,105 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:13,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:13,105 INFO L82 PathProgramCache]: Analyzing trace with hash -714132561, now seen corresponding path program 33 times [2021-06-05 07:10:13,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:13,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417144] [2021-06-05 07:10:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:13,251 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 07:10:13,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417144] [2021-06-05 07:10:13,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642334352] [2021-06-05 07:10:13,251 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 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 07:10:13,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:13,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:13,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:13,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:13,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:13,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:13,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 07:10:13,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:13,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:13,415 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 07:10:13,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-06-05 07:10:13,427 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 07:10:13,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642334352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:13,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:13,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 07:10:13,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955089014] [2021-06-05 07:10:13,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:13,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:13,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:13,428 INFO L87 Difference]: Start difference. First operand 1583 states and 5401 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 07:10:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:13,793 INFO L93 Difference]: Finished difference Result 2090 states and 6923 transitions. [2021-06-05 07:10:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:10:13,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 26 [2021-06-05 07:10:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:13,796 INFO L225 Difference]: With dead ends: 2090 [2021-06-05 07:10:13,796 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 07:10:13,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:10:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 07:10:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1559. [2021-06-05 07:10:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.4127086007702183) internal successors, (5317), 1558 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5317 transitions. [2021-06-05 07:10:13,814 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5317 transitions. Word has length 26 [2021-06-05 07:10:13,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:13,814 INFO L482 AbstractCegarLoop]: Abstraction has 1559 states and 5317 transitions. [2021-06-05 07:10:13,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 07:10:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5317 transitions. [2021-06-05 07:10:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:13,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:13,816 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:14,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:14,016 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash -550251037, now seen corresponding path program 34 times [2021-06-05 07:10:14,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:14,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145525995] [2021-06-05 07:10:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:14,147 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 07:10:14,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145525995] [2021-06-05 07:10:14,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145525995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026493903] [2021-06-05 07:10:14,148 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:10:14,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:14,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:14,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:14,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:14,312 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 07:10:14,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:14,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:14,317 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 07:10:14,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:10:14,332 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 07:10:14,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026493903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:14,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:14,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 07:10:14,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745676822] [2021-06-05 07:10:14,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:14,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:14,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:14,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:14,333 INFO L87 Difference]: Start difference. First operand 1559 states and 5317 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 07:10:14,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:14,775 INFO L93 Difference]: Finished difference Result 2051 states and 6824 transitions. [2021-06-05 07:10:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:10:14,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 26 [2021-06-05 07:10:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:14,778 INFO L225 Difference]: With dead ends: 2051 [2021-06-05 07:10:14,778 INFO L226 Difference]: Without dead ends: 2036 [2021-06-05 07:10:14,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 420.1ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:10:14,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-06-05 07:10:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1558. [2021-06-05 07:10:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.41233140655106) internal successors, (5313), 1557 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5313 transitions. [2021-06-05 07:10:14,797 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5313 transitions. Word has length 26 [2021-06-05 07:10:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:14,797 INFO L482 AbstractCegarLoop]: Abstraction has 1558 states and 5313 transitions. [2021-06-05 07:10:14,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 07:10:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5313 transitions. [2021-06-05 07:10:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:14,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:14,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:14,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:14,999 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:15,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2127183479, now seen corresponding path program 35 times [2021-06-05 07:10:15,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:15,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101149968] [2021-06-05 07:10:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:15,126 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 07:10:15,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:15,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101149968] [2021-06-05 07:10:15,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101149968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:15,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499674989] [2021-06-05 07:10:15,127 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 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 07:10:15,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:10:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:15,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:15,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:15,296 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 07:10:15,297 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:10:15,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:15,305 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 07:10:15,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 07:10:15,340 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 07:10:15,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499674989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:15,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:15,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:10:15,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718429346] [2021-06-05 07:10:15,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:10:15,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:10:15,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:10:15,341 INFO L87 Difference]: Start difference. First operand 1558 states and 5313 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 07:10:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:15,952 INFO L93 Difference]: Finished difference Result 2353 states and 7772 transitions. [2021-06-05 07:10:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:10:15,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 07:10:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:15,955 INFO L225 Difference]: With dead ends: 2353 [2021-06-05 07:10:15,956 INFO L226 Difference]: Without dead ends: 2334 [2021-06-05 07:10:15,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 575.1ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:10:15,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-06-05 07:10:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1541. [2021-06-05 07:10:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.4103896103896103) internal successors, (5252), 1540 states have internal predecessors, (5252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5252 transitions. [2021-06-05 07:10:15,977 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5252 transitions. Word has length 26 [2021-06-05 07:10:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:15,977 INFO L482 AbstractCegarLoop]: Abstraction has 1541 states and 5252 transitions. [2021-06-05 07:10:15,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 07:10:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5252 transitions. [2021-06-05 07:10:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:15,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:15,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:16,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:16,179 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:16,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 36 times [2021-06-05 07:10:16,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:16,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547088957] [2021-06-05 07:10:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:16,304 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 07:10:16,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:16,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547088957] [2021-06-05 07:10:16,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547088957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:16,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133760560] [2021-06-05 07:10:16,305 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 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 07:10:16,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:10:16,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:16,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:16,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:16,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:16,460 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 07:10:16,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:10:16,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:16,480 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 07:10:16,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 07:10:16,529 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 07:10:16,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133760560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:16,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:16,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:10:16,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731268813] [2021-06-05 07:10:16,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:16,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:16,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:16,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:16,530 INFO L87 Difference]: Start difference. First operand 1541 states and 5252 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:16,938 INFO L93 Difference]: Finished difference Result 2055 states and 6840 transitions. [2021-06-05 07:10:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:10:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 07:10:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:16,941 INFO L225 Difference]: With dead ends: 2055 [2021-06-05 07:10:16,941 INFO L226 Difference]: Without dead ends: 2040 [2021-06-05 07:10:16,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:10:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-05 07:10:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1586. [2021-06-05 07:10:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.404416403785489) internal successors, (5396), 1585 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5396 transitions. [2021-06-05 07:10:16,960 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5396 transitions. Word has length 26 [2021-06-05 07:10:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:16,960 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5396 transitions. [2021-06-05 07:10:16,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5396 transitions. [2021-06-05 07:10:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:16,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:16,962 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:17,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 07:10:17,177 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1240114777, now seen corresponding path program 37 times [2021-06-05 07:10:17,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:17,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722360922] [2021-06-05 07:10:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:17,296 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 07:10:17,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:17,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722360922] [2021-06-05 07:10:17,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722360922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:17,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955253530] [2021-06-05 07:10:17,297 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 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 07:10:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:10:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:17,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:17,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:17,444 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 07:10:17,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:17,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:17,448 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 07:10:17,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:10:17,464 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 07:10:17,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955253530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:17,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:17,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:10:17,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462744247] [2021-06-05 07:10:17,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:17,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:17,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:17,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:17,465 INFO L87 Difference]: Start difference. First operand 1586 states and 5396 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 07:10:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:18,051 INFO L93 Difference]: Finished difference Result 2330 states and 7681 transitions. [2021-06-05 07:10:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:10:18,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 26 [2021-06-05 07:10:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:18,055 INFO L225 Difference]: With dead ends: 2330 [2021-06-05 07:10:18,055 INFO L226 Difference]: Without dead ends: 2315 [2021-06-05 07:10:18,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 536.2ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:10:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-06-05 07:10:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1587. [2021-06-05 07:10:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.4060529634300125) internal successors, (5402), 1586 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5402 transitions. [2021-06-05 07:10:18,076 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5402 transitions. Word has length 26 [2021-06-05 07:10:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:18,076 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5402 transitions. [2021-06-05 07:10:18,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 07:10:18,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5402 transitions. [2021-06-05 07:10:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:18,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:18,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:18,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-05 07:10:18,278 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:18,279 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 38 times [2021-06-05 07:10:18,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:18,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930660016] [2021-06-05 07:10:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:18,401 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 07:10:18,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:18,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930660016] [2021-06-05 07:10:18,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930660016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:18,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352681828] [2021-06-05 07:10:18,401 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 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 07:10:18,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:18,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:18,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:18,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:18,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:18,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:18,522 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 07:10:18,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:18,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:18,545 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 07:10:18,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-06-05 07:10:18,613 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 07:10:18,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352681828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:18,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:18,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 07:10:18,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280664904] [2021-06-05 07:10:18,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:10:18,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:18,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:10:18,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:10:18,614 INFO L87 Difference]: Start difference. First operand 1587 states and 5402 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 07:10:18,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:18,996 INFO L93 Difference]: Finished difference Result 2103 states and 7017 transitions. [2021-06-05 07:10:18,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:10:18,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 26 [2021-06-05 07:10:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:18,999 INFO L225 Difference]: With dead ends: 2103 [2021-06-05 07:10:18,999 INFO L226 Difference]: Without dead ends: 2088 [2021-06-05 07:10:18,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:10:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-06-05 07:10:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1590. [2021-06-05 07:10:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.409691629955947) internal successors, (5418), 1589 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5418 transitions. [2021-06-05 07:10:19,018 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5418 transitions. Word has length 26 [2021-06-05 07:10:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:19,018 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5418 transitions. [2021-06-05 07:10:19,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 07:10:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5418 transitions. [2021-06-05 07:10:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:19,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:19,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:19,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 07:10:19,220 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:19,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:19,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 39 times [2021-06-05 07:10:19,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:19,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067119705] [2021-06-05 07:10:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:19,328 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 07:10:19,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:19,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067119705] [2021-06-05 07:10:19,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067119705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:19,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585114556] [2021-06-05 07:10:19,328 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 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 07:10:19,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:19,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:19,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:19,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:19,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:19,458 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 07:10:19,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:19,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:19,484 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 07:10:19,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-06-05 07:10:19,561 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 07:10:19,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585114556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:19,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:19,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 07:10:19,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887793946] [2021-06-05 07:10:19,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:10:19,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:19,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:10:19,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:10:19,562 INFO L87 Difference]: Start difference. First operand 1590 states and 5418 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 07:10:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:19,868 INFO L93 Difference]: Finished difference Result 2135 states and 7120 transitions. [2021-06-05 07:10:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:10:19,869 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 26 [2021-06-05 07:10:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:19,871 INFO L225 Difference]: With dead ends: 2135 [2021-06-05 07:10:19,871 INFO L226 Difference]: Without dead ends: 2120 [2021-06-05 07:10:19,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:10:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-06-05 07:10:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1608. [2021-06-05 07:10:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.4051026757934038) internal successors, (5472), 1607 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5472 transitions. [2021-06-05 07:10:19,891 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5472 transitions. Word has length 26 [2021-06-05 07:10:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:19,891 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5472 transitions. [2021-06-05 07:10:19,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 07:10:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5472 transitions. [2021-06-05 07:10:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:19,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:19,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:20,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:20,094 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 40 times [2021-06-05 07:10:20,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:20,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976506679] [2021-06-05 07:10:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:20,220 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 07:10:20,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:20,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976506679] [2021-06-05 07:10:20,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976506679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:20,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707445787] [2021-06-05 07:10:20,220 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 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 07:10:20,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:20,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:20,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:20,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:20,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:20,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:20,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 07:10:20,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:20,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:20,387 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 07:10:20,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 07:10:20,402 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 07:10:20,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707445787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:20,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:20,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 07:10:20,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444421876] [2021-06-05 07:10:20,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:20,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:20,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:20,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:20,403 INFO L87 Difference]: Start difference. First operand 1608 states and 5472 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 07:10:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:20,811 INFO L93 Difference]: Finished difference Result 2064 states and 6890 transitions. [2021-06-05 07:10:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:10:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 26 [2021-06-05 07:10:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:20,813 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 07:10:20,813 INFO L226 Difference]: Without dead ends: 2049 [2021-06-05 07:10:20,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:10:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-05 07:10:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1629. [2021-06-05 07:10:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.401105651105651) internal successors, (5537), 1628 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5537 transitions. [2021-06-05 07:10:20,832 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5537 transitions. Word has length 26 [2021-06-05 07:10:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:20,832 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 5537 transitions. [2021-06-05 07:10:20,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 07:10:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5537 transitions. [2021-06-05 07:10:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:20,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:20,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:21,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:21,034 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:21,034 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 41 times [2021-06-05 07:10:21,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:21,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146192387] [2021-06-05 07:10:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:21,161 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 07:10:21,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:21,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146192387] [2021-06-05 07:10:21,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146192387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:21,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053634025] [2021-06-05 07:10:21,162 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 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 07:10:21,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:10:21,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:21,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:21,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:21,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:21,308 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 07:10:21,309 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:10:21,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:21,323 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 07:10:21,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:10:21,357 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 07:10:21,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053634025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:21,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:21,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:10:21,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691128368] [2021-06-05 07:10:21,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:21,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:21,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:21,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:21,358 INFO L87 Difference]: Start difference. First operand 1629 states and 5537 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 07:10:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:21,876 INFO L93 Difference]: Finished difference Result 2357 states and 7803 transitions. [2021-06-05 07:10:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:10:21,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 26 [2021-06-05 07:10:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:21,879 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 07:10:21,879 INFO L226 Difference]: Without dead ends: 2342 [2021-06-05 07:10:21,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:10:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-06-05 07:10:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1626. [2021-06-05 07:10:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.4024615384615386) internal successors, (5529), 1625 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5529 transitions. [2021-06-05 07:10:21,900 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5529 transitions. Word has length 26 [2021-06-05 07:10:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:21,900 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5529 transitions. [2021-06-05 07:10:21,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 07:10:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5529 transitions. [2021-06-05 07:10:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:21,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:21,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:22,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:22,117 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 42 times [2021-06-05 07:10:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:22,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779429267] [2021-06-05 07:10:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:22,235 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 07:10:22,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:22,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779429267] [2021-06-05 07:10:22,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779429267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:22,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558782833] [2021-06-05 07:10:22,235 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 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 07:10:22,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:10:22,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:10:22,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:22,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:22,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:22,361 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 07:10:22,362 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:10:22,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:22,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:22,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 07:10:22,402 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 07:10:22,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558782833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:22,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:22,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:10:22,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703507452] [2021-06-05 07:10:22,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:22,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:22,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:22,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:22,403 INFO L87 Difference]: Start difference. First operand 1626 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:10:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:22,884 INFO L93 Difference]: Finished difference Result 2213 states and 7343 transitions. [2021-06-05 07:10:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:10:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-06-05 07:10:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:22,895 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 07:10:22,895 INFO L226 Difference]: Without dead ends: 2188 [2021-06-05 07:10:22,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:10:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-06-05 07:10:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1626. [2021-06-05 07:10:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-06-05 07:10:22,927 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-06-05 07:10:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:22,927 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-06-05 07:10:22,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:10:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-06-05 07:10:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:22,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:22,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:23,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:23,145 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 43 times [2021-06-05 07:10:23,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:23,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218618690] [2021-06-05 07:10:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:23,290 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 07:10:23,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:23,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218618690] [2021-06-05 07:10:23,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218618690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:23,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064572132] [2021-06-05 07:10:23,290 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 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 07:10:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:23,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:23,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:23,421 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 07:10:23,422 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:10:23,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:23,430 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 07:10:23,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:10:23,465 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 07:10:23,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064572132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:23,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:23,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 07:10:23,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936093203] [2021-06-05 07:10:23,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:23,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:23,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:23,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:23,467 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 07:10:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:23,807 INFO L93 Difference]: Finished difference Result 2137 states and 7136 transitions. [2021-06-05 07:10:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:10:23,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 26 [2021-06-05 07:10:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:23,810 INFO L225 Difference]: With dead ends: 2137 [2021-06-05 07:10:23,810 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 07:10:23,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:10:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 07:10:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1626. [2021-06-05 07:10:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-06-05 07:10:23,829 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-06-05 07:10:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:23,829 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-06-05 07:10:23,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 07:10:23,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-06-05 07:10:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:23,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:23,831 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:24,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:24,031 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:24,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1743994595, now seen corresponding path program 55 times [2021-06-05 07:10:24,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:24,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92273252] [2021-06-05 07:10:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:24,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:24,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92273252] [2021-06-05 07:10:24,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92273252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:24,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048258548] [2021-06-05 07:10:24,188 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 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 07:10:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:24,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:24,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:24,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:24,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:24,314 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 07:10:24,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:24,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:24,319 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 07:10:24,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:10:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:24,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048258548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:24,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:24,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 07:10:24,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425043196] [2021-06-05 07:10:24,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:24,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:24,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:24,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:24,337 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 07:10:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:24,619 INFO L93 Difference]: Finished difference Result 2071 states and 6841 transitions. [2021-06-05 07:10:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:10:24,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 26 [2021-06-05 07:10:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:24,622 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 07:10:24,622 INFO L226 Difference]: Without dead ends: 2045 [2021-06-05 07:10:24,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 349.3ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:10:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-05 07:10:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1620. [2021-06-05 07:10:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4033353922174183) internal successors, (5510), 1619 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5510 transitions. [2021-06-05 07:10:24,641 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5510 transitions. Word has length 26 [2021-06-05 07:10:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:24,641 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5510 transitions. [2021-06-05 07:10:24,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 07:10:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5510 transitions. [2021-06-05 07:10:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:24,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:24,643 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:24,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:24,843 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:24,844 INFO L82 PathProgramCache]: Analyzing trace with hash 469684583, now seen corresponding path program 56 times [2021-06-05 07:10:24,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:24,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951983316] [2021-06-05 07:10:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:24,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:24,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951983316] [2021-06-05 07:10:24,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951983316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:24,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989981450] [2021-06-05 07:10:24,998 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 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 07:10:25,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:25,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:25,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:25,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:25,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:25,113 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 07:10:25,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:25,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:25,118 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 07:10:25,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:10:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:25,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989981450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:25,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:25,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 07:10:25,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914976482] [2021-06-05 07:10:25,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:25,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:25,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:25,135 INFO L87 Difference]: Start difference. First operand 1620 states and 5510 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 07:10:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:25,648 INFO L93 Difference]: Finished difference Result 2277 states and 7481 transitions. [2021-06-05 07:10:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:10:25,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 26 [2021-06-05 07:10:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:25,651 INFO L225 Difference]: With dead ends: 2277 [2021-06-05 07:10:25,651 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 07:10:25,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 535.3ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:10:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 07:10:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1610. [2021-06-05 07:10:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.403977625854568) internal successors, (5477), 1609 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5477 transitions. [2021-06-05 07:10:25,671 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5477 transitions. Word has length 26 [2021-06-05 07:10:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:25,671 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5477 transitions. [2021-06-05 07:10:25,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 07:10:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5477 transitions. [2021-06-05 07:10:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:25,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:25,673 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:25,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 07:10:25,874 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:25,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 57 times [2021-06-05 07:10:25,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:25,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569220456] [2021-06-05 07:10:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:25,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569220456] [2021-06-05 07:10:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569220456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717590195] [2021-06-05 07:10:25,987 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 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 07:10:26,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:26,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:26,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:26,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:26,196 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 07:10:26,197 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 07:10:26,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:26,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:26,203 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 07:10:26,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-06-05 07:10:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:26,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717590195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:26,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:26,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:10:26,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495640541] [2021-06-05 07:10:26,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:10:26,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:26,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:10:26,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:10:26,219 INFO L87 Difference]: Start difference. First operand 1610 states and 5477 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 07:10:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:27,044 INFO L93 Difference]: Finished difference Result 2271 states and 7307 transitions. [2021-06-05 07:10:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:10:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 26 [2021-06-05 07:10:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:27,047 INFO L225 Difference]: With dead ends: 2271 [2021-06-05 07:10:27,047 INFO L226 Difference]: Without dead ends: 2241 [2021-06-05 07:10:27,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 602.4ms TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:10:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-06-05 07:10:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1631. [2021-06-05 07:10:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-06-05 07:10:27,068 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-06-05 07:10:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:27,068 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-06-05 07:10:27,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 07:10:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-06-05 07:10:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:27,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:27,070 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:27,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 07:10:27,270 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:27,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1778959663, now seen corresponding path program 58 times [2021-06-05 07:10:27,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:27,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492451145] [2021-06-05 07:10:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:27,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:27,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492451145] [2021-06-05 07:10:27,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492451145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:27,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708220971] [2021-06-05 07:10:27,385 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 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 07:10:27,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:27,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:27,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:27,492 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 07:10:27,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:27,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:27,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:27,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 07:10:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:27,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708220971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:27,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:27,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 07:10:27,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144027428] [2021-06-05 07:10:27,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:27,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:27,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:27,507 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 07:10:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:27,870 INFO L93 Difference]: Finished difference Result 2135 states and 7023 transitions. [2021-06-05 07:10:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:10:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 26 [2021-06-05 07:10:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:27,873 INFO L225 Difference]: With dead ends: 2135 [2021-06-05 07:10:27,873 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 07:10:27,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 357.6ms TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:10:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 07:10:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1631. [2021-06-05 07:10:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-06-05 07:10:27,894 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-06-05 07:10:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:27,894 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-06-05 07:10:27,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 07:10:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-06-05 07:10:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:27,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:27,896 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:28,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 07:10:28,097 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:28,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 59 times [2021-06-05 07:10:28,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:28,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046641937] [2021-06-05 07:10:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:28,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:28,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046641937] [2021-06-05 07:10:28,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046641937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:28,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859926933] [2021-06-05 07:10:28,239 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 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 07:10:28,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:10:28,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:28,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:28,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:28,361 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 07:10:28,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:28,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:28,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:28,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 07:10:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:28,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859926933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:28,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:28,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:10:28,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340265833] [2021-06-05 07:10:28,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:28,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:28,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:28,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:28,380 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 07:10:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:28,764 INFO L93 Difference]: Finished difference Result 2023 states and 6745 transitions. [2021-06-05 07:10:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:10:28,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 26 [2021-06-05 07:10:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:28,767 INFO L225 Difference]: With dead ends: 2023 [2021-06-05 07:10:28,767 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 07:10:28,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:10:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 07:10:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1637. [2021-06-05 07:10:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-06-05 07:10:28,787 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-06-05 07:10:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:28,787 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-06-05 07:10:28,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 07:10:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-06-05 07:10:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:28,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:28,789 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:29,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:29,004 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 60 times [2021-06-05 07:10:29,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:29,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778297950] [2021-06-05 07:10:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:29,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778297950] [2021-06-05 07:10:29,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778297950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339749672] [2021-06-05 07:10:29,125 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 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 07:10:29,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:10:29,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:29,226 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 07:10:29,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:29,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:29,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:29,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 07:10:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:29,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339749672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:29,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:29,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 07:10:29,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508909296] [2021-06-05 07:10:29,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:29,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:29,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:29,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:29,246 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 07:10:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:29,592 INFO L93 Difference]: Finished difference Result 2057 states and 6834 transitions. [2021-06-05 07:10:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:10:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 26 [2021-06-05 07:10:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:29,595 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 07:10:29,595 INFO L226 Difference]: Without dead ends: 2042 [2021-06-05 07:10:29,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:10:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-06-05 07:10:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1637. [2021-06-05 07:10:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-06-05 07:10:29,614 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-06-05 07:10:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:29,614 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-06-05 07:10:29,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 07:10:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-06-05 07:10:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:29,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:29,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:29,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 07:10:29,818 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:29,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:29,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 44 times [2021-06-05 07:10:29,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:29,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595573880] [2021-06-05 07:10:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:29,966 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 07:10:29,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:29,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595573880] [2021-06-05 07:10:29,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595573880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:29,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167437062] [2021-06-05 07:10:29,967 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 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 07:10:29,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:29,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:29,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:29,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:30,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:30,087 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 07:10:30,088 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:10:30,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:30,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:30,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 07:10:30,123 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 07:10:30,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167437062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:30,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:30,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:10:30,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423171901] [2021-06-05 07:10:30,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:30,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:30,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:30,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:30,124 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:10:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:31,263 INFO L93 Difference]: Finished difference Result 2310 states and 7570 transitions. [2021-06-05 07:10:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:10:31,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-06-05 07:10:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:31,270 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 07:10:31,270 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 07:10:31,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 826.4ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:10:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 07:10:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1638. [2021-06-05 07:10:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.392791692119731) internal successors, (5554), 1637 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5554 transitions. [2021-06-05 07:10:31,291 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5554 transitions. Word has length 26 [2021-06-05 07:10:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:31,291 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5554 transitions. [2021-06-05 07:10:31,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:10:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5554 transitions. [2021-06-05 07:10:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:31,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:31,293 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:31,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 07:10:31,494 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:31,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:31,494 INFO L82 PathProgramCache]: Analyzing trace with hash -659260211, now seen corresponding path program 61 times [2021-06-05 07:10:31,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:31,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662077158] [2021-06-05 07:10:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:31,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:31,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662077158] [2021-06-05 07:10:31,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662077158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:31,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512789773] [2021-06-05 07:10:31,588 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 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 07:10:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:31,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:31,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:31,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:31,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:31,735 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 07:10:31,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:31,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:31,740 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 07:10:31,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:10:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:31,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512789773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:31,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:31,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:10:31,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073633072] [2021-06-05 07:10:31,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:31,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:31,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:31,753 INFO L87 Difference]: Start difference. First operand 1638 states and 5554 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:10:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:32,524 INFO L93 Difference]: Finished difference Result 2717 states and 8732 transitions. [2021-06-05 07:10:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:10:32,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 07:10:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:32,528 INFO L225 Difference]: With dead ends: 2717 [2021-06-05 07:10:32,528 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 07:10:32,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:10:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 07:10:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1680. [2021-06-05 07:10:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.4032162001191186) internal successors, (5714), 1679 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5714 transitions. [2021-06-05 07:10:32,551 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5714 transitions. Word has length 26 [2021-06-05 07:10:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:32,552 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5714 transitions. [2021-06-05 07:10:32,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 07:10:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5714 transitions. [2021-06-05 07:10:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:32,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:32,554 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:32,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:32,754 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:32,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 62 times [2021-06-05 07:10:32,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:32,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959558007] [2021-06-05 07:10:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:32,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:32,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959558007] [2021-06-05 07:10:32,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959558007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:32,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023158750] [2021-06-05 07:10:32,852 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 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 07:10:32,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:32,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:32,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:32,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:32,985 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 07:10:32,993 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:10:33,004 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-06-05 07:10:33,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:33,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 07:10:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:33,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023158750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:33,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:33,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:10:33,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732533456] [2021-06-05 07:10:33,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:33,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:33,042 INFO L87 Difference]: Start difference. First operand 1680 states and 5714 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 07:10:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:34,343 INFO L93 Difference]: Finished difference Result 3323 states and 10531 transitions. [2021-06-05 07:10:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:10:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-06-05 07:10:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:34,348 INFO L225 Difference]: With dead ends: 3323 [2021-06-05 07:10:34,348 INFO L226 Difference]: Without dead ends: 3279 [2021-06-05 07:10:34,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 916.1ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:10:34,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-05 07:10:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1708. [2021-06-05 07:10:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.4106619800820153) internal successors, (5822), 1707 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5822 transitions. [2021-06-05 07:10:34,374 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5822 transitions. Word has length 26 [2021-06-05 07:10:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:34,374 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5822 transitions. [2021-06-05 07:10:34,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 07:10:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5822 transitions. [2021-06-05 07:10:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:34,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:34,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:34,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:34,577 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash -32178733, now seen corresponding path program 45 times [2021-06-05 07:10:34,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:34,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093985030] [2021-06-05 07:10:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:34,716 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 07:10:34,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:34,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093985030] [2021-06-05 07:10:34,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093985030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:34,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095912074] [2021-06-05 07:10:34,716 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 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 07:10:34,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:34,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:34,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:34,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:34,925 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 07:10:34,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:10:34,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:34,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 07:10:34,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:150 [2021-06-05 07:10:35,094 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 07:10:35,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095912074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:35,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:35,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:10:35,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655352238] [2021-06-05 07:10:35,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:35,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:35,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:35,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:35,095 INFO L87 Difference]: Start difference. First operand 1708 states and 5822 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:36,754 INFO L93 Difference]: Finished difference Result 2381 states and 7796 transitions. [2021-06-05 07:10:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:10:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 07:10:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:36,758 INFO L225 Difference]: With dead ends: 2381 [2021-06-05 07:10:36,758 INFO L226 Difference]: Without dead ends: 2366 [2021-06-05 07:10:36,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1237.6ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:10:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-06-05 07:10:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1721. [2021-06-05 07:10:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.4069767441860463) internal successors, (5860), 1720 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5860 transitions. [2021-06-05 07:10:36,779 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5860 transitions. Word has length 26 [2021-06-05 07:10:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:36,779 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5860 transitions. [2021-06-05 07:10:36,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5860 transitions. [2021-06-05 07:10:36,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:36,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:36,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:36,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 07:10:36,982 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:36,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:36,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1649711513, now seen corresponding path program 46 times [2021-06-05 07:10:36,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:36,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898923814] [2021-06-05 07:10:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:37,089 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 07:10:37,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:37,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898923814] [2021-06-05 07:10:37,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898923814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840021282] [2021-06-05 07:10:37,090 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 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 07:10:37,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:37,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:37,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:37,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:37,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:37,213 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 07:10:37,218 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:10:37,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:37,225 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 07:10:37,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:10:37,258 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 07:10:37,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840021282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:37,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:37,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:10:37,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039737288] [2021-06-05 07:10:37,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:37,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:37,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:37,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:37,259 INFO L87 Difference]: Start difference. First operand 1721 states and 5860 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:10:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:38,038 INFO L93 Difference]: Finished difference Result 2557 states and 8457 transitions. [2021-06-05 07:10:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:10:38,038 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:10:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:38,041 INFO L225 Difference]: With dead ends: 2557 [2021-06-05 07:10:38,041 INFO L226 Difference]: Without dead ends: 2542 [2021-06-05 07:10:38,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 529.4ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:10:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-06-05 07:10:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1724. [2021-06-05 07:10:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.4062681369704007) internal successors, (5869), 1723 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5869 transitions. [2021-06-05 07:10:38,064 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5869 transitions. Word has length 26 [2021-06-05 07:10:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:38,064 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5869 transitions. [2021-06-05 07:10:38,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:10:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5869 transitions. [2021-06-05 07:10:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:38,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:38,066 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:38,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:38,267 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-06-05 07:10:38,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:38,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162548651] [2021-06-05 07:10:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:38,377 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 07:10:38,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:38,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162548651] [2021-06-05 07:10:38,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162548651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:38,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119163056] [2021-06-05 07:10:38,377 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 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 07:10:38,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:10:38,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:38,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:10:38,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:38,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:38,540 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 07:10:38,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:10:38,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:38,564 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 07:10:38,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-06-05 07:10:38,629 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 07:10:38,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119163056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:38,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:38,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:10:38,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676707439] [2021-06-05 07:10:38,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:38,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:38,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:38,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:38,630 INFO L87 Difference]: Start difference. First operand 1724 states and 5869 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 07:10:39,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:39,305 INFO L93 Difference]: Finished difference Result 2476 states and 8179 transitions. [2021-06-05 07:10:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:10:39,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 26 [2021-06-05 07:10:39,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:39,308 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 07:10:39,308 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 07:10:39,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 562.8ms TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:10:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 07:10:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1710. [2021-06-05 07:10:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.4119368051492103) internal successors, (5831), 1709 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5831 transitions. [2021-06-05 07:10:39,329 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5831 transitions. Word has length 26 [2021-06-05 07:10:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:39,329 INFO L482 AbstractCegarLoop]: Abstraction has 1710 states and 5831 transitions. [2021-06-05 07:10:39,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 07:10:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5831 transitions. [2021-06-05 07:10:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:39,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:39,331 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:39,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-06-05 07:10:39,532 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:39,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:39,532 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 63 times [2021-06-05 07:10:39,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:39,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245155348] [2021-06-05 07:10:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:39,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:39,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245155348] [2021-06-05 07:10:39,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245155348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:39,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225502050] [2021-06-05 07:10:39,642 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 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 07:10:39,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:39,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:39,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:39,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:39,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:39,769 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 07:10:39,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:39,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:39,774 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 07:10:39,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:10:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:39,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225502050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:39,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:39,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:10:39,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535291476] [2021-06-05 07:10:39,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:39,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:39,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:39,786 INFO L87 Difference]: Start difference. First operand 1710 states and 5831 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 07:10:40,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:40,571 INFO L93 Difference]: Finished difference Result 2583 states and 8404 transitions. [2021-06-05 07:10:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:10:40,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 26 [2021-06-05 07:10:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:40,575 INFO L225 Difference]: With dead ends: 2583 [2021-06-05 07:10:40,575 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 07:10:40,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:10:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 07:10:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1766. [2021-06-05 07:10:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 3.405665722379603) internal successors, (6011), 1765 states have internal predecessors, (6011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 6011 transitions. [2021-06-05 07:10:40,597 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 6011 transitions. Word has length 26 [2021-06-05 07:10:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:40,597 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 6011 transitions. [2021-06-05 07:10:40,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 07:10:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 6011 transitions. [2021-06-05 07:10:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:40,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:40,599 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:40,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:40,800 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash 402208991, now seen corresponding path program 64 times [2021-06-05 07:10:40,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:40,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578262917] [2021-06-05 07:10:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:40,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:40,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578262917] [2021-06-05 07:10:40,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578262917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:40,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171740886] [2021-06-05 07:10:40,923 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 07:10:40,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:40,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:40,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:40,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:41,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:41,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:41,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:41,078 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 07:10:41,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:41,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:41,083 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 07:10:41,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:10:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:41,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171740886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:41,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:41,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:10:41,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630406943] [2021-06-05 07:10:41,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:41,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:41,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:41,100 INFO L87 Difference]: Start difference. First operand 1766 states and 6011 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 07:10:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:42,013 INFO L93 Difference]: Finished difference Result 2816 states and 9179 transitions. [2021-06-05 07:10:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:10:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 26 [2021-06-05 07:10:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:42,017 INFO L225 Difference]: With dead ends: 2816 [2021-06-05 07:10:42,017 INFO L226 Difference]: Without dead ends: 2794 [2021-06-05 07:10:42,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:10:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-06-05 07:10:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1780. [2021-06-05 07:10:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 3.3991006183249017) internal successors, (6047), 1779 states have internal predecessors, (6047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 6047 transitions. [2021-06-05 07:10:42,041 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 6047 transitions. Word has length 26 [2021-06-05 07:10:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:42,041 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 6047 transitions. [2021-06-05 07:10:42,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 07:10:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 6047 transitions. [2021-06-05 07:10:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:42,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:42,043 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:42,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 07:10:42,249 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 65 times [2021-06-05 07:10:42,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:42,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944918334] [2021-06-05 07:10:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:42,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:42,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944918334] [2021-06-05 07:10:42,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944918334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:42,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893459344] [2021-06-05 07:10:42,371 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 07:10:42,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:10:42,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:42,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:42,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:42,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:42,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:42,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:42,526 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 07:10:42,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:42,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:42,531 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 07:10:42,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:10:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:42,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893459344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:42,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:42,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:10:42,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022235647] [2021-06-05 07:10:42,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:42,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:42,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:42,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:42,549 INFO L87 Difference]: Start difference. First operand 1780 states and 6047 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 07:10:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:43,374 INFO L93 Difference]: Finished difference Result 2668 states and 8760 transitions. [2021-06-05 07:10:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:10:43,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 26 [2021-06-05 07:10:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:43,377 INFO L225 Difference]: With dead ends: 2668 [2021-06-05 07:10:43,377 INFO L226 Difference]: Without dead ends: 2649 [2021-06-05 07:10:43,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 648.1ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:10:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-06-05 07:10:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 1789. [2021-06-05 07:10:43,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.402684563758389) internal successors, (6084), 1788 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6084 transitions. [2021-06-05 07:10:43,400 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6084 transitions. Word has length 26 [2021-06-05 07:10:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:43,400 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6084 transitions. [2021-06-05 07:10:43,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 07:10:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6084 transitions. [2021-06-05 07:10:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:43,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:43,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:43,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:43,602 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1928409045, now seen corresponding path program 48 times [2021-06-05 07:10:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:43,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108691314] [2021-06-05 07:10:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:43,737 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 07:10:43,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108691314] [2021-06-05 07:10:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108691314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697147289] [2021-06-05 07:10:43,738 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 07:10:43,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:10:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:43,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:43,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:43,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:43,877 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 07:10:43,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:10:43,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:43,897 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 07:10:43,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:75 [2021-06-05 07:10:43,982 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 07:10:43,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697147289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:43,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:43,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:10:43,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456606923] [2021-06-05 07:10:43,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:43,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:43,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:43,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:43,983 INFO L87 Difference]: Start difference. First operand 1789 states and 6084 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:45,066 INFO L93 Difference]: Finished difference Result 2769 states and 9024 transitions. [2021-06-05 07:10:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:10:45,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 07:10:45,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:45,070 INFO L225 Difference]: With dead ends: 2769 [2021-06-05 07:10:45,070 INFO L226 Difference]: Without dead ends: 2754 [2021-06-05 07:10:45,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 843.6ms TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:10:45,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-06-05 07:10:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1789. [2021-06-05 07:10:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.3982102908277403) internal successors, (6076), 1788 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6076 transitions. [2021-06-05 07:10:45,094 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6076 transitions. Word has length 26 [2021-06-05 07:10:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:45,094 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6076 transitions. [2021-06-05 07:10:45,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6076 transitions. [2021-06-05 07:10:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:45,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:45,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:45,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:45,297 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 49 times [2021-06-05 07:10:45,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:45,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940953855] [2021-06-05 07:10:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:45,425 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 07:10:45,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:45,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940953855] [2021-06-05 07:10:45,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940953855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:45,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750918469] [2021-06-05 07:10:45,426 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 07:10:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:45,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:45,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:45,572 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 07:10:45,573 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:10:45,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:45,580 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 07:10:45,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:10:45,613 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 07:10:45,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750918469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:45,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:45,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:10:45,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815548033] [2021-06-05 07:10:45,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:45,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:45,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:45,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:45,613 INFO L87 Difference]: Start difference. First operand 1789 states and 6076 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:10:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:46,079 INFO L93 Difference]: Finished difference Result 2442 states and 8101 transitions. [2021-06-05 07:10:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:10:46,079 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:10:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:46,082 INFO L225 Difference]: With dead ends: 2442 [2021-06-05 07:10:46,082 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 07:10:46,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:10:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 07:10:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1783. [2021-06-05 07:10:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.3956228956228958) internal successors, (6051), 1782 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6051 transitions. [2021-06-05 07:10:46,103 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6051 transitions. Word has length 26 [2021-06-05 07:10:46,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:46,103 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6051 transitions. [2021-06-05 07:10:46,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:10:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6051 transitions. [2021-06-05 07:10:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:46,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:46,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:46,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:46,305 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:46,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1815461431, now seen corresponding path program 50 times [2021-06-05 07:10:46,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:46,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247194961] [2021-06-05 07:10:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:46,435 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 07:10:46,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:46,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247194961] [2021-06-05 07:10:46,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247194961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:46,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675826247] [2021-06-05 07:10:46,436 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 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 07:10:46,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:46,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:46,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:46,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:46,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:46,566 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 07:10:46,567 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:10:46,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:46,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:46,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 07:10:46,602 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 07:10:46,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675826247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:46,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:46,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:10:46,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668299956] [2021-06-05 07:10:46,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:46,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:46,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:46,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:46,603 INFO L87 Difference]: Start difference. First operand 1783 states and 6051 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:47,408 INFO L93 Difference]: Finished difference Result 2378 states and 7896 transitions. [2021-06-05 07:10:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:10:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 07:10:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:47,412 INFO L225 Difference]: With dead ends: 2378 [2021-06-05 07:10:47,412 INFO L226 Difference]: Without dead ends: 2363 [2021-06-05 07:10:47,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:10:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-06-05 07:10:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1772. [2021-06-05 07:10:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.399209486166008) internal successors, (6020), 1771 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6020 transitions. [2021-06-05 07:10:47,433 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6020 transitions. Word has length 26 [2021-06-05 07:10:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:47,433 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 6020 transitions. [2021-06-05 07:10:47,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 07:10:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6020 transitions. [2021-06-05 07:10:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:47,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:47,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 07:10:47,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:47,636 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:47,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-06-05 07:10:47,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:47,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647131766] [2021-06-05 07:10:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:47,780 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 07:10:47,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:47,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647131766] [2021-06-05 07:10:47,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647131766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:47,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665398130] [2021-06-05 07:10:47,780 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 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 07:10:47,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:47,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:47,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:47,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:47,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:47,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 07:10:47,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:10:47,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:47,961 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 07:10:47,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-06-05 07:10:48,027 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 07:10:48,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665398130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:48,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:48,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:10:48,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635373960] [2021-06-05 07:10:48,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:48,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:48,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:48,028 INFO L87 Difference]: Start difference. First operand 1772 states and 6020 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:10:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:48,511 INFO L93 Difference]: Finished difference Result 2374 states and 7919 transitions. [2021-06-05 07:10:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:10:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 07:10:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:48,515 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 07:10:48,515 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 07:10:48,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:10:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 07:10:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1783. [2021-06-05 07:10:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.4079685746352415) internal successors, (6073), 1782 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6073 transitions. [2021-06-05 07:10:48,536 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6073 transitions. Word has length 26 [2021-06-05 07:10:48,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:48,536 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6073 transitions. [2021-06-05 07:10:48,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 07:10:48,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6073 transitions. [2021-06-05 07:10:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:48,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:48,539 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:48,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:48,753 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:48,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1092882871, now seen corresponding path program 66 times [2021-06-05 07:10:48,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:48,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126500776] [2021-06-05 07:10:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:48,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:48,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126500776] [2021-06-05 07:10:48,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126500776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:48,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037259835] [2021-06-05 07:10:48,885 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 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 07:10:48,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:10:48,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:48,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:10:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:49,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:49,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:49,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:49,031 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 07:10:49,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:49,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:49,036 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 07:10:49,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:10:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:49,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037259835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:49,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:49,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 07:10:49,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5843994] [2021-06-05 07:10:49,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:10:49,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:49,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:10:49,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:10:49,049 INFO L87 Difference]: Start difference. First operand 1783 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 07:10:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:50,045 INFO L93 Difference]: Finished difference Result 2367 states and 7833 transitions. [2021-06-05 07:10:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:10:50,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 26 [2021-06-05 07:10:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:50,049 INFO L225 Difference]: With dead ends: 2367 [2021-06-05 07:10:50,049 INFO L226 Difference]: Without dead ends: 2345 [2021-06-05 07:10:50,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 844.0ms TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-06-05 07:10:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1774. [2021-06-05 07:10:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.412859560067682) internal successors, (6051), 1773 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 6051 transitions. [2021-06-05 07:10:50,070 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 6051 transitions. Word has length 26 [2021-06-05 07:10:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:50,070 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 6051 transitions. [2021-06-05 07:10:50,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 07:10:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 6051 transitions. [2021-06-05 07:10:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:50,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:50,072 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:50,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:50,272 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash -167389005, now seen corresponding path program 67 times [2021-06-05 07:10:50,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:50,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681004031] [2021-06-05 07:10:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:50,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681004031] [2021-06-05 07:10:50,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681004031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:50,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338153999] [2021-06-05 07:10:50,406 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 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 07:10:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:50,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 07:10:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:50,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:50,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:50,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:50,542 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 07:10:50,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:50,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:50,547 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 07:10:50,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 07:10:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:50,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338153999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:50,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:50,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 07:10:50,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588866590] [2021-06-05 07:10:50,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:50,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:50,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:50,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:50,564 INFO L87 Difference]: Start difference. First operand 1774 states and 6051 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 07:10:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:51,308 INFO L93 Difference]: Finished difference Result 2445 states and 8079 transitions. [2021-06-05 07:10:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:10:51,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 07:10:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:51,311 INFO L225 Difference]: With dead ends: 2445 [2021-06-05 07:10:51,311 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 07:10:51,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 650.4ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:10:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 07:10:51,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1768. [2021-06-05 07:10:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.411431805319751) internal successors, (6028), 1767 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 6028 transitions. [2021-06-05 07:10:51,332 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 6028 transitions. Word has length 26 [2021-06-05 07:10:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:51,332 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 6028 transitions. [2021-06-05 07:10:51,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 07:10:51,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 6028 transitions. [2021-06-05 07:10:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:51,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:51,334 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:51,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable361 [2021-06-05 07:10:51,534 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1466803217, now seen corresponding path program 68 times [2021-06-05 07:10:51,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:51,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587840635] [2021-06-05 07:10:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:51,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587840635] [2021-06-05 07:10:51,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587840635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999743168] [2021-06-05 07:10:51,659 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 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 07:10:51,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:51,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:51,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:51,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:51,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 07:10:51,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:10:51,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:51,831 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 07:10:51,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:10:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:51,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999743168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:51,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:51,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 07:10:51,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385065758] [2021-06-05 07:10:51,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:10:51,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:51,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:10:51,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:10:51,865 INFO L87 Difference]: Start difference. First operand 1768 states and 6028 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 07:10:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:52,822 INFO L93 Difference]: Finished difference Result 2420 states and 8056 transitions. [2021-06-05 07:10:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:10:52,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-06-05 07:10:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:52,825 INFO L225 Difference]: With dead ends: 2420 [2021-06-05 07:10:52,825 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 07:10:52,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:10:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 07:10:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1770. [2021-06-05 07:10:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.4132278123233464) internal successors, (6038), 1769 states have internal predecessors, (6038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 6038 transitions. [2021-06-05 07:10:52,846 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 6038 transitions. Word has length 26 [2021-06-05 07:10:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:52,846 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 6038 transitions. [2021-06-05 07:10:52,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 07:10:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 6038 transitions. [2021-06-05 07:10:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 07:10:52,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:52,848 INFO L521 BasicCegarLoop]: trace histogram [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 07:10:53,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:53,049 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:53,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1755833907, now seen corresponding path program 69 times [2021-06-05 07:10:53,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:53,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394799149] [2021-06-05 07:10:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:53,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:53,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394799149] [2021-06-05 07:10:53,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394799149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:53,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798931609] [2021-06-05 07:10:53,174 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 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 07:10:53,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:53,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:10:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:53,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:53,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:53,285 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 07:10:53,294 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:10:53,307 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-06-05 07:10:53,309 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 07:10:53,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 07:10:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:53,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798931609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:53,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:53,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:10:53,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033789675] [2021-06-05 07:10:53,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:53,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:53,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:53,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:53,344 INFO L87 Difference]: Start difference. First operand 1770 states and 6038 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 07:10:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:53,937 INFO L93 Difference]: Finished difference Result 2553 states and 8437 transitions. [2021-06-05 07:10:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:10:53,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 26 [2021-06-05 07:10:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:53,941 INFO L225 Difference]: With dead ends: 2553 [2021-06-05 07:10:53,941 INFO L226 Difference]: Without dead ends: 2523 [2021-06-05 07:10:53,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:10:53,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-06-05 07:10:53,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1776. [2021-06-05 07:10:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 3.411830985915493) internal successors, (6056), 1775 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 6056 transitions. [2021-06-05 07:10:53,962 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 6056 transitions. Word has length 26 [2021-06-05 07:10:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:53,962 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 6056 transitions. [2021-06-05 07:10:53,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 07:10:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 6056 transitions. [2021-06-05 07:10:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:53,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:53,964 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:10:54,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:54,164 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-06-05 07:10:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:54,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837128736] [2021-06-05 07:10:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:54,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:54,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837128736] [2021-06-05 07:10:54,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837128736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:54,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790318547] [2021-06-05 07:10:54,201 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 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 07:10:54,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:54,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:54,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790318547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:54,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:54,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:10:54,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537681302] [2021-06-05 07:10:54,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:54,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:54,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:54,310 INFO L87 Difference]: Start difference. First operand 1776 states and 6056 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:10:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:55,133 INFO L93 Difference]: Finished difference Result 4749 states and 14648 transitions. [2021-06-05 07:10:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:10:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-06-05 07:10:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:55,139 INFO L225 Difference]: With dead ends: 4749 [2021-06-05 07:10:55,139 INFO L226 Difference]: Without dead ends: 4749 [2021-06-05 07:10:55,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:10:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2021-06-05 07:10:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 1969. [2021-06-05 07:10:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.4690040650406506) internal successors, (6827), 1968 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6827 transitions. [2021-06-05 07:10:55,175 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6827 transitions. Word has length 28 [2021-06-05 07:10:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:55,175 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6827 transitions. [2021-06-05 07:10:55,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 07:10:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6827 transitions. [2021-06-05 07:10:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:55,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:55,178 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:10:55,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:55,378 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:55,379 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-06-05 07:10:55,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:55,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133331063] [2021-06-05 07:10:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:55,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:55,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133331063] [2021-06-05 07:10:55,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133331063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:55,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420568225] [2021-06-05 07:10:55,415 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 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 07:10:55,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:10:55,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:55,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:55,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420568225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:55,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:55,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:10:55,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945000665] [2021-06-05 07:10:55,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:55,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:55,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:55,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:55,538 INFO L87 Difference]: Start difference. First operand 1969 states and 6827 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 07:10:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:56,635 INFO L93 Difference]: Finished difference Result 6328 states and 19229 transitions. [2021-06-05 07:10:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:10:56,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-06-05 07:10:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:56,643 INFO L225 Difference]: With dead ends: 6328 [2021-06-05 07:10:56,643 INFO L226 Difference]: Without dead ends: 6328 [2021-06-05 07:10:56,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 07:10:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2021-06-05 07:10:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 1980. [2021-06-05 07:10:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.477008590197069) internal successors, (6881), 1979 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6881 transitions. [2021-06-05 07:10:56,696 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6881 transitions. Word has length 28 [2021-06-05 07:10:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:56,696 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6881 transitions. [2021-06-05 07:10:56,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 07:10:56,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6881 transitions. [2021-06-05 07:10:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:56,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:56,699 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:10:56,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:56,899 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:56,899 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-06-05 07:10:56,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:56,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072394929] [2021-06-05 07:10:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:56,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:56,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072394929] [2021-06-05 07:10:56,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072394929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:56,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101188355] [2021-06-05 07:10:56,950 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 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 07:10:56,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:10:56,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101188355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:57,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:57,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:10:57,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332341256] [2021-06-05 07:10:57,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:10:57,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:57,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:10:57,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:10:57,070 INFO L87 Difference]: Start difference. First operand 1980 states and 6881 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 07:10:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:58,172 INFO L93 Difference]: Finished difference Result 5721 states and 17761 transitions. [2021-06-05 07:10:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:10:58,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-06-05 07:10:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:58,180 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 07:10:58,180 INFO L226 Difference]: Without dead ends: 5721 [2021-06-05 07:10:58,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 652.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 07:10:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-05 07:10:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 1928. [2021-06-05 07:10:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.4504411001556825) internal successors, (6649), 1927 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6649 transitions. [2021-06-05 07:10:58,219 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6649 transitions. Word has length 28 [2021-06-05 07:10:58,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:58,219 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6649 transitions. [2021-06-05 07:10:58,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 07:10:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6649 transitions. [2021-06-05 07:10:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:58,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:58,222 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:10:58,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 07:10:58,422 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:58,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-06-05 07:10:58,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:58,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072958174] [2021-06-05 07:10:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:58,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:58,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072958174] [2021-06-05 07:10:58,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072958174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:58,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162758501] [2021-06-05 07:10:58,459 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 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 07:10:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:58,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:58,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162758501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:58,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:58,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:10:58,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492128817] [2021-06-05 07:10:58,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:10:58,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:58,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:10:58,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:10:58,568 INFO L87 Difference]: Start difference. First operand 1928 states and 6649 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 07:10:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:59,541 INFO L93 Difference]: Finished difference Result 4835 states and 14815 transitions. [2021-06-05 07:10:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:10:59,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-06-05 07:10:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:59,547 INFO L225 Difference]: With dead ends: 4835 [2021-06-05 07:10:59,547 INFO L226 Difference]: Without dead ends: 4835 [2021-06-05 07:10:59,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:10:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2021-06-05 07:10:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 1938. [2021-06-05 07:10:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.4460505937016004) internal successors, (6675), 1937 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6675 transitions. [2021-06-05 07:10:59,580 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6675 transitions. Word has length 28 [2021-06-05 07:10:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:59,580 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 6675 transitions. [2021-06-05 07:10:59,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 07:10:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6675 transitions. [2021-06-05 07:10:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:10:59,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:59,582 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:59,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 07:10:59,784 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 70 times [2021-06-05 07:10:59,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:59,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404499077] [2021-06-05 07:10:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:59,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:59,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404499077] [2021-06-05 07:10:59,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404499077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:59,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801816688] [2021-06-05 07:10:59,821 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 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 07:10:59,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:59,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:59,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:10:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:59,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801816688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:59,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:59,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:10:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916747110] [2021-06-05 07:10:59,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:10:59,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:59,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:10:59,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:10:59,920 INFO L87 Difference]: Start difference. First operand 1938 states and 6675 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:00,442 INFO L93 Difference]: Finished difference Result 4254 states and 13212 transitions. [2021-06-05 07:11:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:11:00,442 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 07:11:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:00,448 INFO L225 Difference]: With dead ends: 4254 [2021-06-05 07:11:00,448 INFO L226 Difference]: Without dead ends: 4254 [2021-06-05 07:11:00,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:11:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-06-05 07:11:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 1994. [2021-06-05 07:11:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.431008529854491) internal successors, (6838), 1993 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6838 transitions. [2021-06-05 07:11:00,480 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6838 transitions. Word has length 28 [2021-06-05 07:11:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:00,480 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6838 transitions. [2021-06-05 07:11:00,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6838 transitions. [2021-06-05 07:11:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:00,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:00,482 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:00,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 07:11:00,684 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:00,684 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-06-05 07:11:00,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:00,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231237471] [2021-06-05 07:11:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:00,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:00,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231237471] [2021-06-05 07:11:00,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231237471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:00,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129478243] [2021-06-05 07:11:00,709 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 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 07:11:00,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:00,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:11:00,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:00,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129478243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:00,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:00,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:11:00,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927491992] [2021-06-05 07:11:00,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:00,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:00,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:00,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:00,784 INFO L87 Difference]: Start difference. First operand 1994 states and 6838 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 07:11:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:00,932 INFO L93 Difference]: Finished difference Result 3480 states and 11300 transitions. [2021-06-05 07:11:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:11:00,932 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 28 [2021-06-05 07:11:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:00,936 INFO L225 Difference]: With dead ends: 3480 [2021-06-05 07:11:00,936 INFO L226 Difference]: Without dead ends: 3462 [2021-06-05 07:11:00,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:11:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-06-05 07:11:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 2379. [2021-06-05 07:11:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.5025231286795626) internal successors, (8329), 2378 states have internal predecessors, (8329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8329 transitions. [2021-06-05 07:11:00,965 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8329 transitions. Word has length 28 [2021-06-05 07:11:00,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:00,965 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8329 transitions. [2021-06-05 07:11:00,965 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 07:11:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8329 transitions. [2021-06-05 07:11:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:00,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:00,968 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:01,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:01,170 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:01,170 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-06-05 07:11:01,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:01,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282794754] [2021-06-05 07:11:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:01,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:01,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282794754] [2021-06-05 07:11:01,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282794754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:01,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565552154] [2021-06-05 07:11:01,200 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 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 07:11:01,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:11:01,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:01,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565552154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:01,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:01,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:11:01,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305428203] [2021-06-05 07:11:01,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:01,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:01,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:01,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:01,298 INFO L87 Difference]: Start difference. First operand 2379 states and 8329 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:01,822 INFO L93 Difference]: Finished difference Result 4139 states and 13172 transitions. [2021-06-05 07:11:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:11:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 07:11:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:01,828 INFO L225 Difference]: With dead ends: 4139 [2021-06-05 07:11:01,828 INFO L226 Difference]: Without dead ends: 4092 [2021-06-05 07:11:01,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:11:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-06-05 07:11:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 2547. [2021-06-05 07:11:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 3.52356637863315) internal successors, (8971), 2546 states have internal predecessors, (8971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 8971 transitions. [2021-06-05 07:11:01,864 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 8971 transitions. Word has length 28 [2021-06-05 07:11:01,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:01,864 INFO L482 AbstractCegarLoop]: Abstraction has 2547 states and 8971 transitions. [2021-06-05 07:11:01,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:01,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 8971 transitions. [2021-06-05 07:11:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:01,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:01,867 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:02,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 07:11:02,068 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:02,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1371854597, now seen corresponding path program 71 times [2021-06-05 07:11:02,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:02,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607573881] [2021-06-05 07:11:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:02,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:02,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607573881] [2021-06-05 07:11:02,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607573881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:02,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952728117] [2021-06-05 07:11:02,104 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 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 07:11:02,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:11:02,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:02,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952728117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:02,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:02,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 07:11:02,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617366284] [2021-06-05 07:11:02,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:11:02,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:11:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:11:02,219 INFO L87 Difference]: Start difference. First operand 2547 states and 8971 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 07:11:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:02,596 INFO L93 Difference]: Finished difference Result 4980 states and 16523 transitions. [2021-06-05 07:11:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:11:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 07:11:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:02,603 INFO L225 Difference]: With dead ends: 4980 [2021-06-05 07:11:02,603 INFO L226 Difference]: Without dead ends: 4893 [2021-06-05 07:11:02,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:11:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2021-06-05 07:11:02,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 3198. [2021-06-05 07:11:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 3197 states have (on average 3.5376915858617455) internal successors, (11310), 3197 states have internal predecessors, (11310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 11310 transitions. [2021-06-05 07:11:02,675 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 11310 transitions. Word has length 28 [2021-06-05 07:11:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:02,675 INFO L482 AbstractCegarLoop]: Abstraction has 3198 states and 11310 transitions. [2021-06-05 07:11:02,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 07:11:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 11310 transitions. [2021-06-05 07:11:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:02,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:02,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:02,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-06-05 07:11:02,880 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-06-05 07:11:02,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:02,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117896512] [2021-06-05 07:11:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:02,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:02,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117896512] [2021-06-05 07:11:02,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117896512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:02,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300375265] [2021-06-05 07:11:02,912 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 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 07:11:02,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:02,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:03,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300375265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:03,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:03,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:11:03,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985969172] [2021-06-05 07:11:03,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:03,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:03,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:03,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:03,013 INFO L87 Difference]: Start difference. First operand 3198 states and 11310 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:03,605 INFO L93 Difference]: Finished difference Result 5423 states and 17174 transitions. [2021-06-05 07:11:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:11:03,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 07:11:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:03,612 INFO L225 Difference]: With dead ends: 5423 [2021-06-05 07:11:03,612 INFO L226 Difference]: Without dead ends: 5397 [2021-06-05 07:11:03,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:11:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-06-05 07:11:03,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 3216. [2021-06-05 07:11:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.5430793157076206) internal successors, (11391), 3215 states have internal predecessors, (11391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 11391 transitions. [2021-06-05 07:11:03,666 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 11391 transitions. Word has length 28 [2021-06-05 07:11:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:03,666 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 11391 transitions. [2021-06-05 07:11:03,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 11391 transitions. [2021-06-05 07:11:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:03,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:03,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:03,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:03,876 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:03,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-06-05 07:11:03,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:03,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484546791] [2021-06-05 07:11:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:03,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:03,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484546791] [2021-06-05 07:11:03,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484546791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:03,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491225834] [2021-06-05 07:11:03,907 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 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 07:11:03,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:11:03,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:03,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:03,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:04,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491225834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:04,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:04,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:11:04,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328756387] [2021-06-05 07:11:04,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:04,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:04,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:04,028 INFO L87 Difference]: Start difference. First operand 3216 states and 11391 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:04,605 INFO L93 Difference]: Finished difference Result 5478 states and 17366 transitions. [2021-06-05 07:11:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:11:04,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 07:11:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:04,612 INFO L225 Difference]: With dead ends: 5478 [2021-06-05 07:11:04,612 INFO L226 Difference]: Without dead ends: 5447 [2021-06-05 07:11:04,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:11:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2021-06-05 07:11:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 3206. [2021-06-05 07:11:04,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 3.550390015600624) internal successors, (11379), 3205 states have internal predecessors, (11379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 11379 transitions. [2021-06-05 07:11:04,666 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 11379 transitions. Word has length 28 [2021-06-05 07:11:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:04,666 INFO L482 AbstractCegarLoop]: Abstraction has 3206 states and 11379 transitions. [2021-06-05 07:11:04,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 11379 transitions. [2021-06-05 07:11:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:04,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:04,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:04,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:04,870 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-06-05 07:11:04,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:04,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270823525] [2021-06-05 07:11:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:04,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:04,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270823525] [2021-06-05 07:11:04,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270823525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:04,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878555981] [2021-06-05 07:11:04,900 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 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 07:11:04,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:11:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:04,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:04,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878555981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:04,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:04,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:11:04,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204489430] [2021-06-05 07:11:04,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:04,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:04,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:04,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:04,988 INFO L87 Difference]: Start difference. First operand 3206 states and 11379 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:11:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:05,482 INFO L93 Difference]: Finished difference Result 6636 states and 21425 transitions. [2021-06-05 07:11:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:11:05,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:11:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:05,491 INFO L225 Difference]: With dead ends: 6636 [2021-06-05 07:11:05,492 INFO L226 Difference]: Without dead ends: 6589 [2021-06-05 07:11:05,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:11:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6589 states. [2021-06-05 07:11:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6589 to 3369. [2021-06-05 07:11:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.5973871733966747) internal successors, (12116), 3368 states have internal predecessors, (12116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 12116 transitions. [2021-06-05 07:11:05,556 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 12116 transitions. Word has length 28 [2021-06-05 07:11:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:05,556 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 12116 transitions. [2021-06-05 07:11:05,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:11:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 12116 transitions. [2021-06-05 07:11:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:05,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:05,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:05,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:05,760 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 61 times [2021-06-05 07:11:05,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:05,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617944089] [2021-06-05 07:11:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:05,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:05,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617944089] [2021-06-05 07:11:05,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617944089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:05,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567058877] [2021-06-05 07:11:05,781 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 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 07:11:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:05,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:11:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:05,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567058877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:05,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:05,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 07:11:05,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18781301] [2021-06-05 07:11:05,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:11:05,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:05,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:11:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:11:05,856 INFO L87 Difference]: Start difference. First operand 3369 states and 12116 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 07:11:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:06,001 INFO L93 Difference]: Finished difference Result 5034 states and 16661 transitions. [2021-06-05 07:11:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:11:06,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-06-05 07:11:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:06,007 INFO L225 Difference]: With dead ends: 5034 [2021-06-05 07:11:06,007 INFO L226 Difference]: Without dead ends: 5034 [2021-06-05 07:11:06,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:11:06,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-06-05 07:11:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3201. [2021-06-05 07:11:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 3.556875) internal successors, (11382), 3200 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 11382 transitions. [2021-06-05 07:11:06,069 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 11382 transitions. Word has length 28 [2021-06-05 07:11:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:06,070 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 11382 transitions. [2021-06-05 07:11:06,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 07:11:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 11382 transitions. [2021-06-05 07:11:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:06,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:06,073 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:06,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 07:11:06,274 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:06,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:06,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-06-05 07:11:06,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:06,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190337311] [2021-06-05 07:11:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:06,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:06,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190337311] [2021-06-05 07:11:06,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190337311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:06,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962755298] [2021-06-05 07:11:06,305 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 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 07:11:06,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:06,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:06,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962755298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:06,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:06,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:11:06,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662656468] [2021-06-05 07:11:06,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:06,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:06,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:06,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:06,414 INFO L87 Difference]: Start difference. First operand 3201 states and 11382 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 07:11:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:06,982 INFO L93 Difference]: Finished difference Result 7123 states and 22742 transitions. [2021-06-05 07:11:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:11:06,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 28 [2021-06-05 07:11:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:06,991 INFO L225 Difference]: With dead ends: 7123 [2021-06-05 07:11:06,991 INFO L226 Difference]: Without dead ends: 7123 [2021-06-05 07:11:06,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:11:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7123 states. [2021-06-05 07:11:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7123 to 3231. [2021-06-05 07:11:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 3.556346749226006) internal successors, (11487), 3230 states have internal predecessors, (11487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 11487 transitions. [2021-06-05 07:11:07,082 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 11487 transitions. Word has length 28 [2021-06-05 07:11:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:07,082 INFO L482 AbstractCegarLoop]: Abstraction has 3231 states and 11487 transitions. [2021-06-05 07:11:07,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 07:11:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 11487 transitions. [2021-06-05 07:11:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:07,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:07,086 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:07,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 07:11:07,286 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-06-05 07:11:07,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:07,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224651008] [2021-06-05 07:11:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:07,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:07,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224651008] [2021-06-05 07:11:07,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224651008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:07,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258334853] [2021-06-05 07:11:07,317 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 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 07:11:07,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:11:07,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:07,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:07,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258334853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:07,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:07,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:11:07,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421361594] [2021-06-05 07:11:07,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:07,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:07,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:07,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:07,407 INFO L87 Difference]: Start difference. First operand 3231 states and 11487 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 07:11:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:08,064 INFO L93 Difference]: Finished difference Result 7417 states and 23715 transitions. [2021-06-05 07:11:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:11:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 28 [2021-06-05 07:11:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:08,074 INFO L225 Difference]: With dead ends: 7417 [2021-06-05 07:11:08,074 INFO L226 Difference]: Without dead ends: 7417 [2021-06-05 07:11:08,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:11:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7417 states. [2021-06-05 07:11:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7417 to 3361. [2021-06-05 07:11:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 3.5398809523809525) internal successors, (11894), 3360 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 11894 transitions. [2021-06-05 07:11:08,162 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 11894 transitions. Word has length 28 [2021-06-05 07:11:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:08,162 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 11894 transitions. [2021-06-05 07:11:08,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 07:11:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 11894 transitions. [2021-06-05 07:11:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:08,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:08,166 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:08,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 07:11:08,366 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:08,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:08,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-06-05 07:11:08,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:08,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061772451] [2021-06-05 07:11:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:08,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:08,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061772451] [2021-06-05 07:11:08,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061772451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:08,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9425565] [2021-06-05 07:11:08,408 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 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 07:11:08,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:08,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:08,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9425565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:08,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:08,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:11:08,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053530186] [2021-06-05 07:11:08,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:08,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:08,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:08,498 INFO L87 Difference]: Start difference. First operand 3361 states and 11894 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:11:09,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:09,022 INFO L93 Difference]: Finished difference Result 7892 states and 25256 transitions. [2021-06-05 07:11:09,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:11:09,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:11:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:09,032 INFO L225 Difference]: With dead ends: 7892 [2021-06-05 07:11:09,032 INFO L226 Difference]: Without dead ends: 7879 [2021-06-05 07:11:09,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:11:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2021-06-05 07:11:09,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 4006. [2021-06-05 07:11:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4006 states, 4005 states have (on average 3.5845193508114854) internal successors, (14356), 4005 states have internal predecessors, (14356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 14356 transitions. [2021-06-05 07:11:09,116 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 14356 transitions. Word has length 28 [2021-06-05 07:11:09,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:09,116 INFO L482 AbstractCegarLoop]: Abstraction has 4006 states and 14356 transitions. [2021-06-05 07:11:09,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:11:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 14356 transitions. [2021-06-05 07:11:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:09,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:09,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:09,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 07:11:09,325 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:09,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:09,325 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-06-05 07:11:09,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:09,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074516789] [2021-06-05 07:11:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:09,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:09,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074516789] [2021-06-05 07:11:09,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074516789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:09,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854260976] [2021-06-05 07:11:09,354 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 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 07:11:09,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:11:09,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:09,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854260976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:09,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:09,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:11:09,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554240997] [2021-06-05 07:11:09,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:09,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:09,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:09,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:09,442 INFO L87 Difference]: Start difference. First operand 4006 states and 14356 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:11:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:09,977 INFO L93 Difference]: Finished difference Result 8151 states and 25974 transitions. [2021-06-05 07:11:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:11:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:11:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:09,987 INFO L225 Difference]: With dead ends: 8151 [2021-06-05 07:11:09,988 INFO L226 Difference]: Without dead ends: 8151 [2021-06-05 07:11:09,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:11:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-05 07:11:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 3759. [2021-06-05 07:11:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 3.5494944119212346) internal successors, (13339), 3758 states have internal predecessors, (13339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 13339 transitions. [2021-06-05 07:11:10,064 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 13339 transitions. Word has length 28 [2021-06-05 07:11:10,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:10,064 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 13339 transitions. [2021-06-05 07:11:10,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:11:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 13339 transitions. [2021-06-05 07:11:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:10,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:10,068 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:10,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 07:11:10,269 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-06-05 07:11:10,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:10,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386422300] [2021-06-05 07:11:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:10,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:10,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386422300] [2021-06-05 07:11:10,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386422300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:10,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367067444] [2021-06-05 07:11:10,299 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:11:10,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:11:10,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:10,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:10,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367067444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:10,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:10,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:11:10,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269234127] [2021-06-05 07:11:10,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:10,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:10,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:10,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:10,388 INFO L87 Difference]: Start difference. First operand 3759 states and 13339 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 07:11:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:11,038 INFO L93 Difference]: Finished difference Result 7259 states and 23813 transitions. [2021-06-05 07:11:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:11:11,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 28 [2021-06-05 07:11:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:11,048 INFO L225 Difference]: With dead ends: 7259 [2021-06-05 07:11:11,048 INFO L226 Difference]: Without dead ends: 7255 [2021-06-05 07:11:11,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:11:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7255 states. [2021-06-05 07:11:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7255 to 3392. [2021-06-05 07:11:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 3.5956944854025363) internal successors, (12193), 3391 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 12193 transitions. [2021-06-05 07:11:11,117 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 12193 transitions. Word has length 28 [2021-06-05 07:11:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:11,117 INFO L482 AbstractCegarLoop]: Abstraction has 3392 states and 12193 transitions. [2021-06-05 07:11:11,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 07:11:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 12193 transitions. [2021-06-05 07:11:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:11,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:11,121 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:11,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 07:11:11,321 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-06-05 07:11:11,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:11,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777452215] [2021-06-05 07:11:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:11,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:11,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777452215] [2021-06-05 07:11:11,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777452215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:11,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523662026] [2021-06-05 07:11:11,352 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 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 07:11:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:11,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523662026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:11,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:11,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:11:11,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302571185] [2021-06-05 07:11:11,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:11,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:11,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:11,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:11,456 INFO L87 Difference]: Start difference. First operand 3392 states and 12193 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 07:11:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:12,363 INFO L93 Difference]: Finished difference Result 11542 states and 38132 transitions. [2021-06-05 07:11:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:11:12,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-06-05 07:11:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:12,379 INFO L225 Difference]: With dead ends: 11542 [2021-06-05 07:11:12,379 INFO L226 Difference]: Without dead ends: 11542 [2021-06-05 07:11:12,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:11:12,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2021-06-05 07:11:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 3680. [2021-06-05 07:11:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 3.678173416689318) internal successors, (13532), 3679 states have internal predecessors, (13532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 13532 transitions. [2021-06-05 07:11:12,480 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 13532 transitions. Word has length 28 [2021-06-05 07:11:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:12,480 INFO L482 AbstractCegarLoop]: Abstraction has 3680 states and 13532 transitions. [2021-06-05 07:11:12,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 07:11:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 13532 transitions. [2021-06-05 07:11:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:12,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:12,485 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:12,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:12,685 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-06-05 07:11:12,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:12,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235406027] [2021-06-05 07:11:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:12,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:12,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235406027] [2021-06-05 07:11:12,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235406027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:12,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988763452] [2021-06-05 07:11:12,720 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 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 07:11:12,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:12,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988763452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:12,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:12,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:11:12,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600101694] [2021-06-05 07:11:12,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:12,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:12,827 INFO L87 Difference]: Start difference. First operand 3680 states and 13532 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 07:11:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:13,764 INFO L93 Difference]: Finished difference Result 11234 states and 37308 transitions. [2021-06-05 07:11:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:11:13,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-06-05 07:11:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:13,782 INFO L225 Difference]: With dead ends: 11234 [2021-06-05 07:11:13,782 INFO L226 Difference]: Without dead ends: 11234 [2021-06-05 07:11:13,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 559.1ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:11:13,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11234 states. [2021-06-05 07:11:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11234 to 3634. [2021-06-05 07:11:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 3.6584090283512247) internal successors, (13291), 3633 states have internal predecessors, (13291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 13291 transitions. [2021-06-05 07:11:13,889 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 13291 transitions. Word has length 28 [2021-06-05 07:11:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:13,889 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 13291 transitions. [2021-06-05 07:11:13,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 07:11:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 13291 transitions. [2021-06-05 07:11:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:13,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:13,893 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:14,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 07:11:14,094 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-06-05 07:11:14,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:14,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480595867] [2021-06-05 07:11:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:14,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:14,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480595867] [2021-06-05 07:11:14,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480595867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:14,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716018214] [2021-06-05 07:11:14,125 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 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 07:11:14,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:11:14,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:14,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:14,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716018214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:14,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:14,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:11:14,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055154133] [2021-06-05 07:11:14,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:14,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:14,223 INFO L87 Difference]: Start difference. First operand 3634 states and 13291 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 07:11:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:15,030 INFO L93 Difference]: Finished difference Result 10540 states and 33835 transitions. [2021-06-05 07:11:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 07:11:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-05 07:11:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:15,044 INFO L225 Difference]: With dead ends: 10540 [2021-06-05 07:11:15,045 INFO L226 Difference]: Without dead ends: 10540 [2021-06-05 07:11:15,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 445.1ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:11:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10540 states. [2021-06-05 07:11:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10540 to 3674. [2021-06-05 07:11:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 3.662673563844269) internal successors, (13453), 3673 states have internal predecessors, (13453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 13453 transitions. [2021-06-05 07:11:15,140 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 13453 transitions. Word has length 28 [2021-06-05 07:11:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:15,140 INFO L482 AbstractCegarLoop]: Abstraction has 3674 states and 13453 transitions. [2021-06-05 07:11:15,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 07:11:15,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 13453 transitions. [2021-06-05 07:11:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:15,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:15,144 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:15,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:15,345 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-06-05 07:11:15,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:15,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366463506] [2021-06-05 07:11:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:15,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:15,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366463506] [2021-06-05 07:11:15,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366463506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:15,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725401885] [2021-06-05 07:11:15,375 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 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 07:11:15,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:15,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:15,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:15,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:15,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725401885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:15,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:15,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:11:15,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065046725] [2021-06-05 07:11:15,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:15,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:15,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:15,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:15,464 INFO L87 Difference]: Start difference. First operand 3674 states and 13453 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 07:11:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:16,244 INFO L93 Difference]: Finished difference Result 9924 states and 32320 transitions. [2021-06-05 07:11:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:11:16,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-05 07:11:16,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:16,258 INFO L225 Difference]: With dead ends: 9924 [2021-06-05 07:11:16,258 INFO L226 Difference]: Without dead ends: 9916 [2021-06-05 07:11:16,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:11:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9916 states. [2021-06-05 07:11:16,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9916 to 3640. [2021-06-05 07:11:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 3.6575982412750756) internal successors, (13310), 3639 states have internal predecessors, (13310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 13310 transitions. [2021-06-05 07:11:16,374 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 13310 transitions. Word has length 28 [2021-06-05 07:11:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:16,374 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 13310 transitions. [2021-06-05 07:11:16,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 07:11:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 13310 transitions. [2021-06-05 07:11:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:16,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:16,378 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:16,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:16,578 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:16,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:16,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-06-05 07:11:16,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:16,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587654632] [2021-06-05 07:11:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:16,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:16,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587654632] [2021-06-05 07:11:16,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587654632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:16,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287938748] [2021-06-05 07:11:16,609 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 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 07:11:16,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:11:16,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:16,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:16,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287938748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:16,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:16,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:11:16,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134160401] [2021-06-05 07:11:16,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:16,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:16,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:16,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:16,718 INFO L87 Difference]: Start difference. First operand 3640 states and 13310 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:17,530 INFO L93 Difference]: Finished difference Result 9536 states and 31236 transitions. [2021-06-05 07:11:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:11:17,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 07:11:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:17,544 INFO L225 Difference]: With dead ends: 9536 [2021-06-05 07:11:17,544 INFO L226 Difference]: Without dead ends: 9536 [2021-06-05 07:11:17,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:11:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9536 states. [2021-06-05 07:11:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9536 to 3656. [2021-06-05 07:11:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 3.6590971272229824) internal successors, (13374), 3655 states have internal predecessors, (13374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 13374 transitions. [2021-06-05 07:11:17,633 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 13374 transitions. Word has length 28 [2021-06-05 07:11:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:17,633 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 13374 transitions. [2021-06-05 07:11:17,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 13374 transitions. [2021-06-05 07:11:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:17,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:17,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:17,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:17,838 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:17,838 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-06-05 07:11:17,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:17,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957696899] [2021-06-05 07:11:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:17,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:17,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957696899] [2021-06-05 07:11:17,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957696899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:17,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954832494] [2021-06-05 07:11:17,892 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 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 07:11:17,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:11:17,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:17,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954832494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:17,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:17,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:11:17,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601137200] [2021-06-05 07:11:17,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:17,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:17,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:17,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:17,992 INFO L87 Difference]: Start difference. First operand 3656 states and 13374 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:18,837 INFO L93 Difference]: Finished difference Result 9201 states and 30441 transitions. [2021-06-05 07:11:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:11:18,837 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 07:11:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:18,851 INFO L225 Difference]: With dead ends: 9201 [2021-06-05 07:11:18,851 INFO L226 Difference]: Without dead ends: 9193 [2021-06-05 07:11:18,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:11:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2021-06-05 07:11:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 3324. [2021-06-05 07:11:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 3.570869696057779) internal successors, (11866), 3323 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 11866 transitions. [2021-06-05 07:11:18,933 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 11866 transitions. Word has length 28 [2021-06-05 07:11:18,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:18,933 INFO L482 AbstractCegarLoop]: Abstraction has 3324 states and 11866 transitions. [2021-06-05 07:11:18,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:11:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 11866 transitions. [2021-06-05 07:11:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:18,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:18,937 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:19,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:19,145 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-06-05 07:11:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:19,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991433649] [2021-06-05 07:11:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:19,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:19,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991433649] [2021-06-05 07:11:19,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991433649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:19,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140303271] [2021-06-05 07:11:19,176 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 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 07:11:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:19,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:19,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140303271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:19,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:19,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:11:19,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976150339] [2021-06-05 07:11:19,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:19,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:19,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:19,283 INFO L87 Difference]: Start difference. First operand 3324 states and 11866 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:11:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:20,093 INFO L93 Difference]: Finished difference Result 6988 states and 22842 transitions. [2021-06-05 07:11:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:11:20,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 07:11:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:20,103 INFO L225 Difference]: With dead ends: 6988 [2021-06-05 07:11:20,103 INFO L226 Difference]: Without dead ends: 6988 [2021-06-05 07:11:20,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:11:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-06-05 07:11:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 3336. [2021-06-05 07:11:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 3.569415292353823) internal successors, (11904), 3335 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 11904 transitions. [2021-06-05 07:11:20,167 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 11904 transitions. Word has length 28 [2021-06-05 07:11:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:20,167 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 11904 transitions. [2021-06-05 07:11:20,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:11:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 11904 transitions. [2021-06-05 07:11:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:20,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:20,171 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:20,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 07:11:20,372 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:20,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-06-05 07:11:20,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:20,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812691881] [2021-06-05 07:11:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:20,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:20,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812691881] [2021-06-05 07:11:20,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812691881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:20,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744249793] [2021-06-05 07:11:20,404 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 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 07:11:20,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:20,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:20,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744249793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:20,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:20,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:11:20,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930092514] [2021-06-05 07:11:20,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:20,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:20,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:20,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:20,527 INFO L87 Difference]: Start difference. First operand 3336 states and 11904 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:21,443 INFO L93 Difference]: Finished difference Result 7916 states and 25231 transitions. [2021-06-05 07:11:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:11:21,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:11:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:21,470 INFO L225 Difference]: With dead ends: 7916 [2021-06-05 07:11:21,470 INFO L226 Difference]: Without dead ends: 7916 [2021-06-05 07:11:21,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 07:11:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2021-06-05 07:11:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 3402. [2021-06-05 07:11:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 3.5639517788885624) internal successors, (12121), 3401 states have internal predecessors, (12121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 12121 transitions. [2021-06-05 07:11:21,538 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 12121 transitions. Word has length 28 [2021-06-05 07:11:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:21,538 INFO L482 AbstractCegarLoop]: Abstraction has 3402 states and 12121 transitions. [2021-06-05 07:11:21,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 12121 transitions. [2021-06-05 07:11:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:21,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:21,542 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:21,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 07:11:21,743 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:21,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:21,743 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 75 times [2021-06-05 07:11:21,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:21,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743523611] [2021-06-05 07:11:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:21,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:21,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743523611] [2021-06-05 07:11:21,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743523611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:21,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994055892] [2021-06-05 07:11:21,774 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 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 07:11:21,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:11:21,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:21,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:21,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994055892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:21,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:21,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:11:21,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949806977] [2021-06-05 07:11:21,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:21,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:21,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:21,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:21,885 INFO L87 Difference]: Start difference. First operand 3402 states and 12121 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:22,769 INFO L93 Difference]: Finished difference Result 7299 states and 23603 transitions. [2021-06-05 07:11:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:11:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:11:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:22,780 INFO L225 Difference]: With dead ends: 7299 [2021-06-05 07:11:22,780 INFO L226 Difference]: Without dead ends: 7295 [2021-06-05 07:11:22,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:11:22,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7295 states. [2021-06-05 07:11:22,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7295 to 3337. [2021-06-05 07:11:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 3.5617505995203835) internal successors, (11882), 3336 states have internal predecessors, (11882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 11882 transitions. [2021-06-05 07:11:22,848 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 11882 transitions. Word has length 28 [2021-06-05 07:11:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:22,848 INFO L482 AbstractCegarLoop]: Abstraction has 3337 states and 11882 transitions. [2021-06-05 07:11:22,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 11882 transitions. [2021-06-05 07:11:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:22,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:22,852 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:23,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 07:11:23,053 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 72 times [2021-06-05 07:11:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:23,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503581081] [2021-06-05 07:11:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:23,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:23,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503581081] [2021-06-05 07:11:23,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503581081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:23,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346506415] [2021-06-05 07:11:23,093 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 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 07:11:23,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:11:23,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:23,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346506415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:23,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:23,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:11:23,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543040955] [2021-06-05 07:11:23,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:23,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:23,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:23,183 INFO L87 Difference]: Start difference. First operand 3337 states and 11882 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 07:11:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:23,701 INFO L93 Difference]: Finished difference Result 6442 states and 21191 transitions. [2021-06-05 07:11:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:11:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 07:11:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:23,710 INFO L225 Difference]: With dead ends: 6442 [2021-06-05 07:11:23,710 INFO L226 Difference]: Without dead ends: 6442 [2021-06-05 07:11:23,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:11:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6442 states. [2021-06-05 07:11:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6442 to 3341. [2021-06-05 07:11:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.5634730538922157) internal successors, (11902), 3340 states have internal predecessors, (11902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 11902 transitions. [2021-06-05 07:11:23,764 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 11902 transitions. Word has length 28 [2021-06-05 07:11:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:23,764 INFO L482 AbstractCegarLoop]: Abstraction has 3341 states and 11902 transitions. [2021-06-05 07:11:23,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 07:11:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 11902 transitions. [2021-06-05 07:11:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:23,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:23,768 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:23,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 07:11:23,968 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 73 times [2021-06-05 07:11:23,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:23,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421885335] [2021-06-05 07:11:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:24,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:24,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421885335] [2021-06-05 07:11:24,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421885335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:24,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284307469] [2021-06-05 07:11:24,014 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 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 07:11:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:24,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284307469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:24,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:24,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:11:24,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251244671] [2021-06-05 07:11:24,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:24,104 INFO L87 Difference]: Start difference. First operand 3341 states and 11902 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 07:11:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:24,753 INFO L93 Difference]: Finished difference Result 6916 states and 22513 transitions. [2021-06-05 07:11:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:11:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 07:11:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:24,764 INFO L225 Difference]: With dead ends: 6916 [2021-06-05 07:11:24,764 INFO L226 Difference]: Without dead ends: 6916 [2021-06-05 07:11:24,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 387.1ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:11:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-06-05 07:11:24,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 3355. [2021-06-05 07:11:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 3.5608228980322005) internal successors, (11943), 3354 states have internal predecessors, (11943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 11943 transitions. [2021-06-05 07:11:24,830 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 11943 transitions. Word has length 28 [2021-06-05 07:11:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:24,830 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 11943 transitions. [2021-06-05 07:11:24,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 07:11:24,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 11943 transitions. [2021-06-05 07:11:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:24,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:24,834 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:25,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 07:11:25,035 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:25,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:25,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 74 times [2021-06-05 07:11:25,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:25,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824980046] [2021-06-05 07:11:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:25,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:25,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824980046] [2021-06-05 07:11:25,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824980046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:25,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250453657] [2021-06-05 07:11:25,073 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 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 07:11:25,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:25,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:25,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:25,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:25,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250453657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:25,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:25,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:11:25,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668015871] [2021-06-05 07:11:25,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:25,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:25,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:25,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:25,164 INFO L87 Difference]: Start difference. First operand 3355 states and 11943 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 07:11:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:25,900 INFO L93 Difference]: Finished difference Result 7422 states and 23945 transitions. [2021-06-05 07:11:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 07:11:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 07:11:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:25,910 INFO L225 Difference]: With dead ends: 7422 [2021-06-05 07:11:25,910 INFO L226 Difference]: Without dead ends: 7422 [2021-06-05 07:11:25,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:11:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-06-05 07:11:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 3435. [2021-06-05 07:11:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.554164239953407) internal successors, (12205), 3434 states have internal predecessors, (12205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 12205 transitions. [2021-06-05 07:11:25,980 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 12205 transitions. Word has length 28 [2021-06-05 07:11:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:25,981 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 12205 transitions. [2021-06-05 07:11:25,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 07:11:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 12205 transitions. [2021-06-05 07:11:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:25,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:25,985 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:26,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 07:11:26,185 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 75 times [2021-06-05 07:11:26,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:26,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300466099] [2021-06-05 07:11:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:26,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:26,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300466099] [2021-06-05 07:11:26,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300466099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:26,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189060245] [2021-06-05 07:11:26,216 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 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 07:11:26,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:11:26,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:26,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:26,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:26,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189060245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:26,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:26,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 07:11:26,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813700363] [2021-06-05 07:11:26,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:26,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:26,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:26,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:26,321 INFO L87 Difference]: Start difference. First operand 3435 states and 12205 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 07:11:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:26,798 INFO L93 Difference]: Finished difference Result 7221 states and 24725 transitions. [2021-06-05 07:11:26,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:11:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 28 [2021-06-05 07:11:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:26,808 INFO L225 Difference]: With dead ends: 7221 [2021-06-05 07:11:26,808 INFO L226 Difference]: Without dead ends: 7221 [2021-06-05 07:11:26,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:11:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-06-05 07:11:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 4565. [2021-06-05 07:11:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 3.672655565293602) internal successors, (16762), 4564 states have internal predecessors, (16762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 16762 transitions. [2021-06-05 07:11:26,885 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 16762 transitions. Word has length 28 [2021-06-05 07:11:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:26,885 INFO L482 AbstractCegarLoop]: Abstraction has 4565 states and 16762 transitions. [2021-06-05 07:11:26,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 07:11:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 16762 transitions. [2021-06-05 07:11:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:26,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:26,890 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:27,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 07:11:27,091 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:27,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 76 times [2021-06-05 07:11:27,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:27,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815407788] [2021-06-05 07:11:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:27,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:27,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815407788] [2021-06-05 07:11:27,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815407788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:27,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918661802] [2021-06-05 07:11:27,127 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 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 07:11:27,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:27,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:27,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:27,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918661802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:27,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:27,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:11:27,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293255674] [2021-06-05 07:11:27,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:27,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:27,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:27,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:27,237 INFO L87 Difference]: Start difference. First operand 4565 states and 16762 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 07:11:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:27,911 INFO L93 Difference]: Finished difference Result 8350 states and 28540 transitions. [2021-06-05 07:11:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:11:27,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 07:11:27,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:27,924 INFO L225 Difference]: With dead ends: 8350 [2021-06-05 07:11:27,924 INFO L226 Difference]: Without dead ends: 8346 [2021-06-05 07:11:27,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:11:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-06-05 07:11:27,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 4457. [2021-06-05 07:11:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 3.683572710951526) internal successors, (16414), 4456 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 16414 transitions. [2021-06-05 07:11:28,010 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 16414 transitions. Word has length 28 [2021-06-05 07:11:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:28,010 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 16414 transitions. [2021-06-05 07:11:28,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 07:11:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 16414 transitions. [2021-06-05 07:11:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:28,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:28,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:28,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 07:11:28,216 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:28,216 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 76 times [2021-06-05 07:11:28,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:28,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238332729] [2021-06-05 07:11:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:28,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:28,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238332729] [2021-06-05 07:11:28,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238332729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:28,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301830050] [2021-06-05 07:11:28,241 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 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 07:11:28,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:28,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:28,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:28,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301830050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:28,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:28,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:11:28,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84554132] [2021-06-05 07:11:28,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:28,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:28,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:28,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:28,338 INFO L87 Difference]: Start difference. First operand 4457 states and 16414 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:29,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:29,088 INFO L93 Difference]: Finished difference Result 9491 states and 32102 transitions. [2021-06-05 07:11:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:11:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 07:11:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:29,101 INFO L225 Difference]: With dead ends: 9491 [2021-06-05 07:11:29,101 INFO L226 Difference]: Without dead ends: 9479 [2021-06-05 07:11:29,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:11:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9479 states. [2021-06-05 07:11:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9479 to 4937. [2021-06-05 07:11:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 3.7670178282009723) internal successors, (18594), 4936 states have internal predecessors, (18594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 18594 transitions. [2021-06-05 07:11:29,195 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 18594 transitions. Word has length 28 [2021-06-05 07:11:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:29,195 INFO L482 AbstractCegarLoop]: Abstraction has 4937 states and 18594 transitions. [2021-06-05 07:11:29,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 18594 transitions. [2021-06-05 07:11:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:29,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:29,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:29,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:29,401 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 77 times [2021-06-05 07:11:29,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:29,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111450567] [2021-06-05 07:11:29,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:29,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:29,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111450567] [2021-06-05 07:11:29,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111450567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:29,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847849955] [2021-06-05 07:11:29,427 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 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 07:11:29,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:11:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:29,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:29,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847849955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:29,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:29,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:11:29,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939497530] [2021-06-05 07:11:29,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:29,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:29,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:29,523 INFO L87 Difference]: Start difference. First operand 4937 states and 18594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:30,243 INFO L93 Difference]: Finished difference Result 9821 states and 33130 transitions. [2021-06-05 07:11:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:11:30,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 07:11:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:30,257 INFO L225 Difference]: With dead ends: 9821 [2021-06-05 07:11:30,257 INFO L226 Difference]: Without dead ends: 9821 [2021-06-05 07:11:30,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:11:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9821 states. [2021-06-05 07:11:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9821 to 4957. [2021-06-05 07:11:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.7516142050040355) internal successors, (18593), 4956 states have internal predecessors, (18593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 18593 transitions. [2021-06-05 07:11:30,353 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 18593 transitions. Word has length 28 [2021-06-05 07:11:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:30,353 INFO L482 AbstractCegarLoop]: Abstraction has 4957 states and 18593 transitions. [2021-06-05 07:11:30,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 18593 transitions. [2021-06-05 07:11:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:30,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:30,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:30,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:30,560 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 78 times [2021-06-05 07:11:30,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:30,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718572658] [2021-06-05 07:11:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:30,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:30,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718572658] [2021-06-05 07:11:30,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718572658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:30,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095633581] [2021-06-05 07:11:30,590 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 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 07:11:30,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:11:30,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:30,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:30,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095633581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:30,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:30,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:11:30,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438659799] [2021-06-05 07:11:30,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:11:30,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:30,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:11:30,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:11:30,665 INFO L87 Difference]: Start difference. First operand 4957 states and 18593 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 07:11:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:31,057 INFO L93 Difference]: Finished difference Result 9285 states and 33102 transitions. [2021-06-05 07:11:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:11:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-06-05 07:11:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:31,072 INFO L225 Difference]: With dead ends: 9285 [2021-06-05 07:11:31,072 INFO L226 Difference]: Without dead ends: 9202 [2021-06-05 07:11:31,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:11:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-06-05 07:11:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6390. [2021-06-05 07:11:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6390 states, 6389 states have (on average 3.796994834872437) internal successors, (24259), 6389 states have internal predecessors, (24259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6390 states to 6390 states and 24259 transitions. [2021-06-05 07:11:31,178 INFO L78 Accepts]: Start accepts. Automaton has 6390 states and 24259 transitions. Word has length 28 [2021-06-05 07:11:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:31,178 INFO L482 AbstractCegarLoop]: Abstraction has 6390 states and 24259 transitions. [2021-06-05 07:11:31,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:11:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 6390 states and 24259 transitions. [2021-06-05 07:11:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:31,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:31,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:31,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-05 07:11:31,387 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:31,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 79 times [2021-06-05 07:11:31,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:31,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88128570] [2021-06-05 07:11:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:31,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:31,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88128570] [2021-06-05 07:11:31,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88128570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:31,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407535023] [2021-06-05 07:11:31,417 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 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 07:11:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:11:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:31,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407535023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:31,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:31,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 07:11:31,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846965092] [2021-06-05 07:11:31,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:11:31,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:31,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:11:31,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:11:31,497 INFO L87 Difference]: Start difference. First operand 6390 states and 24259 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 07:11:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:31,656 INFO L93 Difference]: Finished difference Result 8836 states and 31362 transitions. [2021-06-05 07:11:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:11:31,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-06-05 07:11:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:31,669 INFO L225 Difference]: With dead ends: 8836 [2021-06-05 07:11:31,669 INFO L226 Difference]: Without dead ends: 8836 [2021-06-05 07:11:31,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:11:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-06-05 07:11:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 6536. [2021-06-05 07:11:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 6535 states have (on average 3.7749043611323643) internal successors, (24669), 6535 states have internal predecessors, (24669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 24669 transitions. [2021-06-05 07:11:31,769 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 24669 transitions. Word has length 28 [2021-06-05 07:11:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:31,769 INFO L482 AbstractCegarLoop]: Abstraction has 6536 states and 24669 transitions. [2021-06-05 07:11:31,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 07:11:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 24669 transitions. [2021-06-05 07:11:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:31,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:31,777 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:31,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:31,978 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:31,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:31,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 80 times [2021-06-05 07:11:31,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:31,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197298182] [2021-06-05 07:11:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:32,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:32,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197298182] [2021-06-05 07:11:32,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197298182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:32,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456453741] [2021-06-05 07:11:32,014 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 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 07:11:32,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:32,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:32,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456453741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:32,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:32,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:11:32,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194887037] [2021-06-05 07:11:32,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:32,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:32,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:32,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:32,094 INFO L87 Difference]: Start difference. First operand 6536 states and 24669 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:11:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:32,729 INFO L93 Difference]: Finished difference Result 13521 states and 47319 transitions. [2021-06-05 07:11:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:11:32,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 07:11:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:32,751 INFO L225 Difference]: With dead ends: 13521 [2021-06-05 07:11:32,751 INFO L226 Difference]: Without dead ends: 13521 [2021-06-05 07:11:32,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:11:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2021-06-05 07:11:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 7289. [2021-06-05 07:11:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7289 states, 7288 states have (on average 3.784714599341383) internal successors, (27583), 7288 states have internal predecessors, (27583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 27583 transitions. [2021-06-05 07:11:32,912 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 27583 transitions. Word has length 28 [2021-06-05 07:11:32,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:32,912 INFO L482 AbstractCegarLoop]: Abstraction has 7289 states and 27583 transitions. [2021-06-05 07:11:32,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:11:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 27583 transitions. [2021-06-05 07:11:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:32,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:32,922 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:33,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:33,122 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:33,122 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 81 times [2021-06-05 07:11:33,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:33,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807523213] [2021-06-05 07:11:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:33,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:33,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807523213] [2021-06-05 07:11:33,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807523213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:33,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184774147] [2021-06-05 07:11:33,158 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 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 07:11:33,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:11:33,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:33,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:33,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184774147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:33,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:33,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 07:11:33,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875682249] [2021-06-05 07:11:33,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:11:33,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:33,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:11:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:11:33,242 INFO L87 Difference]: Start difference. First operand 7289 states and 27583 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 07:11:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:33,814 INFO L93 Difference]: Finished difference Result 13718 states and 48041 transitions. [2021-06-05 07:11:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:11:33,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-06-05 07:11:33,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:33,837 INFO L225 Difference]: With dead ends: 13718 [2021-06-05 07:11:33,837 INFO L226 Difference]: Without dead ends: 13718 [2021-06-05 07:11:33,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:11:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13718 states. [2021-06-05 07:11:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13718 to 7565. [2021-06-05 07:11:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7565 states, 7564 states have (on average 3.7618984664198836) internal successors, (28455), 7564 states have internal predecessors, (28455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 28455 transitions. [2021-06-05 07:11:34,023 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 28455 transitions. Word has length 28 [2021-06-05 07:11:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:34,023 INFO L482 AbstractCegarLoop]: Abstraction has 7565 states and 28455 transitions. [2021-06-05 07:11:34,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 07:11:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 28455 transitions. [2021-06-05 07:11:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:34,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:34,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:34,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 07:11:34,234 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash -191201267, now seen corresponding path program 82 times [2021-06-05 07:11:34,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:34,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507410917] [2021-06-05 07:11:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:34,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:34,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507410917] [2021-06-05 07:11:34,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507410917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:34,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348502514] [2021-06-05 07:11:34,260 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 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 07:11:34,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:34,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:34,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:34,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348502514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:34,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:34,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:11:34,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438077969] [2021-06-05 07:11:34,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:34,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:34,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:34,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:34,336 INFO L87 Difference]: Start difference. First operand 7565 states and 28455 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 07:11:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:34,641 INFO L93 Difference]: Finished difference Result 10107 states and 36572 transitions. [2021-06-05 07:11:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:11:34,642 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 28 [2021-06-05 07:11:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:34,657 INFO L225 Difference]: With dead ends: 10107 [2021-06-05 07:11:34,658 INFO L226 Difference]: Without dead ends: 10077 [2021-06-05 07:11:34,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:11:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10077 states. [2021-06-05 07:11:34,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10077 to 8418. [2021-06-05 07:11:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7842461684685755) internal successors, (31852), 8417 states have internal predecessors, (31852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31852 transitions. [2021-06-05 07:11:34,795 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31852 transitions. Word has length 28 [2021-06-05 07:11:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:34,795 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 31852 transitions. [2021-06-05 07:11:34,795 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 07:11:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31852 transitions. [2021-06-05 07:11:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:34,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:34,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:35,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 07:11:35,006 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:35,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 83 times [2021-06-05 07:11:35,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:35,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872150950] [2021-06-05 07:11:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:35,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:35,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872150950] [2021-06-05 07:11:35,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872150950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:35,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727261042] [2021-06-05 07:11:35,046 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:11:35,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:11:35,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:35,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:35,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:35,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727261042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:35,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:35,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:11:35,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945087409] [2021-06-05 07:11:35,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:11:35,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:11:35,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:11:35,126 INFO L87 Difference]: Start difference. First operand 8418 states and 31852 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 07:11:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:35,462 INFO L93 Difference]: Finished difference Result 10717 states and 38597 transitions. [2021-06-05 07:11:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:11:35,463 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 28 [2021-06-05 07:11:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:35,479 INFO L225 Difference]: With dead ends: 10717 [2021-06-05 07:11:35,480 INFO L226 Difference]: Without dead ends: 10717 [2021-06-05 07:11:35,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:11:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10717 states. [2021-06-05 07:11:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10717 to 8458. [2021-06-05 07:11:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8458 states, 8457 states have (on average 3.780418588151827) internal successors, (31971), 8457 states have internal predecessors, (31971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8458 states to 8458 states and 31971 transitions. [2021-06-05 07:11:35,619 INFO L78 Accepts]: Start accepts. Automaton has 8458 states and 31971 transitions. Word has length 28 [2021-06-05 07:11:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:35,619 INFO L482 AbstractCegarLoop]: Abstraction has 8458 states and 31971 transitions. [2021-06-05 07:11:35,619 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 07:11:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 8458 states and 31971 transitions. [2021-06-05 07:11:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:35,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:35,631 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:35,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:35,831 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 84 times [2021-06-05 07:11:35,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:35,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235529948] [2021-06-05 07:11:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:35,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:35,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235529948] [2021-06-05 07:11:35,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235529948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:35,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495597520] [2021-06-05 07:11:35,862 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 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 07:11:35,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:11:35,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:35,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:35,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495597520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:35,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:35,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 07:11:35,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798794516] [2021-06-05 07:11:35,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:11:35,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:35,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:11:35,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:11:35,936 INFO L87 Difference]: Start difference. First operand 8458 states and 31971 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 07:11:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:36,461 INFO L93 Difference]: Finished difference Result 14431 states and 51407 transitions. [2021-06-05 07:11:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:11:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 28 [2021-06-05 07:11:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:36,486 INFO L225 Difference]: With dead ends: 14431 [2021-06-05 07:11:36,486 INFO L226 Difference]: Without dead ends: 14427 [2021-06-05 07:11:36,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:11:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-06-05 07:11:36,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 8356. [2021-06-05 07:11:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8356 states, 8355 states have (on average 3.784320766008378) internal successors, (31618), 8355 states have internal predecessors, (31618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8356 states to 8356 states and 31618 transitions. [2021-06-05 07:11:36,727 INFO L78 Accepts]: Start accepts. Automaton has 8356 states and 31618 transitions. Word has length 28 [2021-06-05 07:11:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:36,727 INFO L482 AbstractCegarLoop]: Abstraction has 8356 states and 31618 transitions. [2021-06-05 07:11:36,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 07:11:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8356 states and 31618 transitions. [2021-06-05 07:11:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:36,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:36,739 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:36,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 07:11:36,939 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:36,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:36,939 INFO L82 PathProgramCache]: Analyzing trace with hash 795274241, now seen corresponding path program 85 times [2021-06-05 07:11:36,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:36,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731148977] [2021-06-05 07:11:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:36,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:36,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731148977] [2021-06-05 07:11:36,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731148977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:36,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719911153] [2021-06-05 07:11:36,971 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 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 07:11:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:36,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:11:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:37,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719911153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:37,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:37,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:11:37,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386336128] [2021-06-05 07:11:37,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:11:37,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:11:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:11:37,056 INFO L87 Difference]: Start difference. First operand 8356 states and 31618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 07:11:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:37,471 INFO L93 Difference]: Finished difference Result 10928 states and 39376 transitions. [2021-06-05 07:11:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:11:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-06-05 07:11:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:37,493 INFO L225 Difference]: With dead ends: 10928 [2021-06-05 07:11:37,493 INFO L226 Difference]: Without dead ends: 10928 [2021-06-05 07:11:37,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:11:37,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10928 states. [2021-06-05 07:11:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 8277. [2021-06-05 07:11:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.779603673272112) internal successors, (31280), 8276 states have internal predecessors, (31280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31280 transitions. [2021-06-05 07:11:37,639 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31280 transitions. Word has length 28 [2021-06-05 07:11:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:37,639 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31280 transitions. [2021-06-05 07:11:37,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:11:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31280 transitions. [2021-06-05 07:11:37,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:37,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:37,650 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:37,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:37,853 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 86 times [2021-06-05 07:11:37,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:37,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088895983] [2021-06-05 07:11:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:37,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:37,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088895983] [2021-06-05 07:11:37,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088895983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:37,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914791584] [2021-06-05 07:11:37,889 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 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 07:11:37,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:37,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:37,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:37,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:37,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914791584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:37,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:37,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:11:37,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620405997] [2021-06-05 07:11:37,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:11:37,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:37,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:11:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:11:37,963 INFO L87 Difference]: Start difference. First operand 8277 states and 31280 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:11:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:38,575 INFO L93 Difference]: Finished difference Result 14287 states and 50815 transitions. [2021-06-05 07:11:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:11:38,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 07:11:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:38,599 INFO L225 Difference]: With dead ends: 14287 [2021-06-05 07:11:38,599 INFO L226 Difference]: Without dead ends: 14275 [2021-06-05 07:11:38,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:11:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14275 states. [2021-06-05 07:11:38,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14275 to 8277. [2021-06-05 07:11:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.7791203479942) internal successors, (31276), 8276 states have internal predecessors, (31276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31276 transitions. [2021-06-05 07:11:38,803 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31276 transitions. Word has length 28 [2021-06-05 07:11:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:38,803 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31276 transitions. [2021-06-05 07:11:38,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:11:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31276 transitions. [2021-06-05 07:11:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:38,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:38,815 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:39,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 07:11:39,021 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 87 times [2021-06-05 07:11:39,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:39,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972026342] [2021-06-05 07:11:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:39,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:39,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972026342] [2021-06-05 07:11:39,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972026342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:39,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606909347] [2021-06-05 07:11:39,057 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 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 07:11:39,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:11:39,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:39,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:39,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606909347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:39,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:39,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:11:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193477426] [2021-06-05 07:11:39,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:39,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:39,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:39,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:39,152 INFO L87 Difference]: Start difference. First operand 8277 states and 31276 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:40,169 INFO L93 Difference]: Finished difference Result 21967 states and 76854 transitions. [2021-06-05 07:11:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 07:11:40,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 07:11:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:40,209 INFO L225 Difference]: With dead ends: 21967 [2021-06-05 07:11:40,209 INFO L226 Difference]: Without dead ends: 21967 [2021-06-05 07:11:40,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 620.5ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 07:11:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21967 states. [2021-06-05 07:11:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21967 to 11428. [2021-06-05 07:11:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11428 states, 11427 states have (on average 3.8238382777631923) internal successors, (43695), 11427 states have internal predecessors, (43695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11428 states to 11428 states and 43695 transitions. [2021-06-05 07:11:40,553 INFO L78 Accepts]: Start accepts. Automaton has 11428 states and 43695 transitions. Word has length 28 [2021-06-05 07:11:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:40,553 INFO L482 AbstractCegarLoop]: Abstraction has 11428 states and 43695 transitions. [2021-06-05 07:11:40,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 11428 states and 43695 transitions. [2021-06-05 07:11:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:40,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:40,569 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:40,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 07:11:40,769 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:40,770 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 88 times [2021-06-05 07:11:40,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:40,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277337127] [2021-06-05 07:11:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:40,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:40,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277337127] [2021-06-05 07:11:40,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277337127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:40,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902653525] [2021-06-05 07:11:40,805 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 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 07:11:40,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:40,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:40,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902653525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:40,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:40,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:11:40,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035697446] [2021-06-05 07:11:40,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:40,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:40,886 INFO L87 Difference]: Start difference. First operand 11428 states and 43695 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:41,789 INFO L93 Difference]: Finished difference Result 21082 states and 74573 transitions. [2021-06-05 07:11:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:11:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 07:11:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:41,827 INFO L225 Difference]: With dead ends: 21082 [2021-06-05 07:11:41,828 INFO L226 Difference]: Without dead ends: 21070 [2021-06-05 07:11:41,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 545.4ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:11:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21070 states. [2021-06-05 07:11:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21070 to 11250. [2021-06-05 07:11:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11250 states, 11249 states have (on average 3.8307405102675793) internal successors, (43092), 11249 states have internal predecessors, (43092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11250 states to 11250 states and 43092 transitions. [2021-06-05 07:11:42,158 INFO L78 Accepts]: Start accepts. Automaton has 11250 states and 43092 transitions. Word has length 28 [2021-06-05 07:11:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:42,158 INFO L482 AbstractCegarLoop]: Abstraction has 11250 states and 43092 transitions. [2021-06-05 07:11:42,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 11250 states and 43092 transitions. [2021-06-05 07:11:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:42,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:42,175 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:42,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:42,375 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:42,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 89 times [2021-06-05 07:11:42,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:42,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217862501] [2021-06-05 07:11:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:42,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:42,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217862501] [2021-06-05 07:11:42,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217862501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:42,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941639369] [2021-06-05 07:11:42,411 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 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 07:11:42,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:11:42,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:42,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:42,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:42,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941639369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:42,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:42,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:11:42,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076233800] [2021-06-05 07:11:42,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:11:42,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:42,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:11:42,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:11:42,493 INFO L87 Difference]: Start difference. First operand 11250 states and 43092 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:43,388 INFO L93 Difference]: Finished difference Result 20939 states and 73944 transitions. [2021-06-05 07:11:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:11:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 07:11:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:43,426 INFO L225 Difference]: With dead ends: 20939 [2021-06-05 07:11:43,426 INFO L226 Difference]: Without dead ends: 20903 [2021-06-05 07:11:43,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 502.0ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:11:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20903 states. [2021-06-05 07:11:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20903 to 11290. [2021-06-05 07:11:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11290 states, 11289 states have (on average 3.8302772610505804) internal successors, (43240), 11289 states have internal predecessors, (43240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 43240 transitions. [2021-06-05 07:11:43,785 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 43240 transitions. Word has length 28 [2021-06-05 07:11:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:43,786 INFO L482 AbstractCegarLoop]: Abstraction has 11290 states and 43240 transitions. [2021-06-05 07:11:43,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:11:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 43240 transitions. [2021-06-05 07:11:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:43,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:43,803 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:44,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:44,003 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:44,004 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 90 times [2021-06-05 07:11:44,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:44,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864314345] [2021-06-05 07:11:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:44,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:44,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864314345] [2021-06-05 07:11:44,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864314345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:44,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776709785] [2021-06-05 07:11:44,043 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 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 07:11:44,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:11:44,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:44,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:44,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776709785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:44,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:44,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:11:44,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68038641] [2021-06-05 07:11:44,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:44,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:44,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:44,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:44,161 INFO L87 Difference]: Start difference. First operand 11290 states and 43240 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:45,440 INFO L93 Difference]: Finished difference Result 20726 states and 73402 transitions. [2021-06-05 07:11:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 07:11:45,440 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:11:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:45,478 INFO L225 Difference]: With dead ends: 20726 [2021-06-05 07:11:45,478 INFO L226 Difference]: Without dead ends: 20726 [2021-06-05 07:11:45,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 813.6ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:11:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20726 states. [2021-06-05 07:11:45,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20726 to 11482. [2021-06-05 07:11:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11482 states, 11481 states have (on average 3.8212699242226287) internal successors, (43872), 11481 states have internal predecessors, (43872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11482 states to 11482 states and 43872 transitions. [2021-06-05 07:11:45,758 INFO L78 Accepts]: Start accepts. Automaton has 11482 states and 43872 transitions. Word has length 28 [2021-06-05 07:11:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:45,758 INFO L482 AbstractCegarLoop]: Abstraction has 11482 states and 43872 transitions. [2021-06-05 07:11:45,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 11482 states and 43872 transitions. [2021-06-05 07:11:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:45,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:45,855 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:46,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 07:11:46,055 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:46,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 91 times [2021-06-05 07:11:46,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:46,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049828318] [2021-06-05 07:11:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:46,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:46,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049828318] [2021-06-05 07:11:46,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049828318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:46,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115975550] [2021-06-05 07:11:46,092 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 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 07:11:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:46,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:46,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:46,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115975550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:46,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:46,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:11:46,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796174092] [2021-06-05 07:11:46,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:46,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:46,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:46,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:46,199 INFO L87 Difference]: Start difference. First operand 11482 states and 43872 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:47,309 INFO L93 Difference]: Finished difference Result 20187 states and 71933 transitions. [2021-06-05 07:11:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:11:47,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:11:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:47,345 INFO L225 Difference]: With dead ends: 20187 [2021-06-05 07:11:47,346 INFO L226 Difference]: Without dead ends: 20175 [2021-06-05 07:11:47,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 678.8ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 07:11:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20175 states. [2021-06-05 07:11:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20175 to 11366. [2021-06-05 07:11:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.825780906291245) internal successors, (43480), 11365 states have internal predecessors, (43480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 43480 transitions. [2021-06-05 07:11:47,610 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 43480 transitions. Word has length 28 [2021-06-05 07:11:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:47,610 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 43480 transitions. [2021-06-05 07:11:47,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 43480 transitions. [2021-06-05 07:11:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:47,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:47,626 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:47,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 07:11:47,827 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 92 times [2021-06-05 07:11:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:47,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128712305] [2021-06-05 07:11:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:47,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:47,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128712305] [2021-06-05 07:11:47,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128712305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:47,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345491713] [2021-06-05 07:11:47,864 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 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 07:11:47,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:47,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:47,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:47,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345491713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:47,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:47,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 07:11:47,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408491848] [2021-06-05 07:11:47,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:47,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:47,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:47,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:47,955 INFO L87 Difference]: Start difference. First operand 11366 states and 43480 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:11:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:48,904 INFO L93 Difference]: Finished difference Result 19429 states and 69858 transitions. [2021-06-05 07:11:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:11:48,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 07:11:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:48,941 INFO L225 Difference]: With dead ends: 19429 [2021-06-05 07:11:48,941 INFO L226 Difference]: Without dead ends: 19393 [2021-06-05 07:11:48,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:11:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19393 states. [2021-06-05 07:11:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19393 to 11390. [2021-06-05 07:11:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11390 states, 11389 states have (on average 3.8247431732373345) internal successors, (43560), 11389 states have internal predecessors, (43560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11390 states to 11390 states and 43560 transitions. [2021-06-05 07:11:49,207 INFO L78 Accepts]: Start accepts. Automaton has 11390 states and 43560 transitions. Word has length 28 [2021-06-05 07:11:49,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:49,207 INFO L482 AbstractCegarLoop]: Abstraction has 11390 states and 43560 transitions. [2021-06-05 07:11:49,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:11:49,207 INFO L276 IsEmpty]: Start isEmpty. Operand 11390 states and 43560 transitions. [2021-06-05 07:11:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:49,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:49,223 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:49,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 07:11:49,424 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 93 times [2021-06-05 07:11:49,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:49,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808737764] [2021-06-05 07:11:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:49,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:49,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808737764] [2021-06-05 07:11:49,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808737764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:49,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593560623] [2021-06-05 07:11:49,467 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 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 07:11:49,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:11:49,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:49,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:49,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:49,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593560623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:49,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:49,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:11:49,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820689322] [2021-06-05 07:11:49,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:49,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:49,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:49,582 INFO L87 Difference]: Start difference. First operand 11390 states and 43560 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:11:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:50,746 INFO L93 Difference]: Finished difference Result 28523 states and 101952 transitions. [2021-06-05 07:11:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 07:11:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 07:11:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:50,864 INFO L225 Difference]: With dead ends: 28523 [2021-06-05 07:11:50,864 INFO L226 Difference]: Without dead ends: 28523 [2021-06-05 07:11:50,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 681.4ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 07:11:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28523 states. [2021-06-05 07:11:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28523 to 11724. [2021-06-05 07:11:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11724 states, 11723 states have (on average 3.850294293269641) internal successors, (45137), 11723 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11724 states to 11724 states and 45137 transitions. [2021-06-05 07:11:51,157 INFO L78 Accepts]: Start accepts. Automaton has 11724 states and 45137 transitions. Word has length 28 [2021-06-05 07:11:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:51,157 INFO L482 AbstractCegarLoop]: Abstraction has 11724 states and 45137 transitions. [2021-06-05 07:11:51,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:11:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11724 states and 45137 transitions. [2021-06-05 07:11:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:51,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:51,173 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:51,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 07:11:51,374 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 94 times [2021-06-05 07:11:51,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:51,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958489176] [2021-06-05 07:11:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:51,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:51,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958489176] [2021-06-05 07:11:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958489176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:51,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008676082] [2021-06-05 07:11:51,416 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:11:51,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:11:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:51,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:51,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008676082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:51,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:51,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:11:51,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179778255] [2021-06-05 07:11:51,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:51,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:51,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:51,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:51,533 INFO L87 Difference]: Start difference. First operand 11724 states and 45137 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:11:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:52,623 INFO L93 Difference]: Finished difference Result 27968 states and 100678 transitions. [2021-06-05 07:11:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 07:11:52,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 07:11:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:52,685 INFO L225 Difference]: With dead ends: 27968 [2021-06-05 07:11:52,686 INFO L226 Difference]: Without dead ends: 27968 [2021-06-05 07:11:52,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 671.1ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 07:11:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27968 states. [2021-06-05 07:11:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27968 to 11614. [2021-06-05 07:11:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11614 states, 11613 states have (on average 3.837595797812796) internal successors, (44566), 11613 states have internal predecessors, (44566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11614 states to 11614 states and 44566 transitions. [2021-06-05 07:11:53,122 INFO L78 Accepts]: Start accepts. Automaton has 11614 states and 44566 transitions. Word has length 28 [2021-06-05 07:11:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:53,122 INFO L482 AbstractCegarLoop]: Abstraction has 11614 states and 44566 transitions. [2021-06-05 07:11:53,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:11:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 11614 states and 44566 transitions. [2021-06-05 07:11:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:53,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:53,140 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:53,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 07:11:53,340 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:53,341 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 95 times [2021-06-05 07:11:53,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:53,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831606330] [2021-06-05 07:11:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:53,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:53,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831606330] [2021-06-05 07:11:53,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831606330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:53,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597809070] [2021-06-05 07:11:53,375 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 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 07:11:53,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:11:53,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:53,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:53,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597809070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:53,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:53,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:11:53,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429568697] [2021-06-05 07:11:53,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:53,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:53,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:53,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:53,488 INFO L87 Difference]: Start difference. First operand 11614 states and 44566 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 07:11:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:54,246 INFO L93 Difference]: Finished difference Result 22124 states and 79964 transitions. [2021-06-05 07:11:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:11:54,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 28 [2021-06-05 07:11:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:54,286 INFO L225 Difference]: With dead ends: 22124 [2021-06-05 07:11:54,286 INFO L226 Difference]: Without dead ends: 22124 [2021-06-05 07:11:54,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:11:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22124 states. [2021-06-05 07:11:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22124 to 11623. [2021-06-05 07:11:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11623 states, 11622 states have (on average 3.8366029943211153) internal successors, (44589), 11622 states have internal predecessors, (44589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:54,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11623 states to 11623 states and 44589 transitions. [2021-06-05 07:11:54,548 INFO L78 Accepts]: Start accepts. Automaton has 11623 states and 44589 transitions. Word has length 28 [2021-06-05 07:11:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:54,548 INFO L482 AbstractCegarLoop]: Abstraction has 11623 states and 44589 transitions. [2021-06-05 07:11:54,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 07:11:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11623 states and 44589 transitions. [2021-06-05 07:11:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:54,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:54,565 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:54,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:54,765 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 96 times [2021-06-05 07:11:54,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:54,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798261985] [2021-06-05 07:11:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:54,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:54,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798261985] [2021-06-05 07:11:54,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798261985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:54,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132327117] [2021-06-05 07:11:54,808 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 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 07:11:54,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:11:54,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:54,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132327117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:54,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:54,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:11:54,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403607392] [2021-06-05 07:11:54,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:11:54,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:54,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:11:54,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:11:54,922 INFO L87 Difference]: Start difference. First operand 11623 states and 44589 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:11:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:55,581 INFO L93 Difference]: Finished difference Result 20483 states and 74724 transitions. [2021-06-05 07:11:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:11:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 07:11:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:55,619 INFO L225 Difference]: With dead ends: 20483 [2021-06-05 07:11:55,619 INFO L226 Difference]: Without dead ends: 20483 [2021-06-05 07:11:55,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:11:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2021-06-05 07:11:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 11635. [2021-06-05 07:11:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.8359119821213685) internal successors, (44627), 11634 states have internal predecessors, (44627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 44627 transitions. [2021-06-05 07:11:55,915 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 44627 transitions. Word has length 28 [2021-06-05 07:11:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:55,915 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 44627 transitions. [2021-06-05 07:11:55,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:11:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 44627 transitions. [2021-06-05 07:11:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:55,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:55,932 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:56,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 07:11:56,132 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:56,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 97 times [2021-06-05 07:11:56,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:56,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796214896] [2021-06-05 07:11:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:56,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:56,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796214896] [2021-06-05 07:11:56,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796214896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:56,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817499502] [2021-06-05 07:11:56,177 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 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 07:11:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:56,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:56,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817499502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:56,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:56,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:11:56,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753775865] [2021-06-05 07:11:56,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:56,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:56,291 INFO L87 Difference]: Start difference. First operand 11635 states and 44627 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:57,288 INFO L93 Difference]: Finished difference Result 21266 states and 76961 transitions. [2021-06-05 07:11:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 07:11:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:11:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:57,327 INFO L225 Difference]: With dead ends: 21266 [2021-06-05 07:11:57,327 INFO L226 Difference]: Without dead ends: 21266 [2021-06-05 07:11:57,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 07:11:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21266 states. [2021-06-05 07:11:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21266 to 11743. [2021-06-05 07:11:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 3.8290751149718956) internal successors, (44961), 11742 states have internal predecessors, (44961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 44961 transitions. [2021-06-05 07:11:57,611 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 44961 transitions. Word has length 28 [2021-06-05 07:11:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:57,611 INFO L482 AbstractCegarLoop]: Abstraction has 11743 states and 44961 transitions. [2021-06-05 07:11:57,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 44961 transitions. [2021-06-05 07:11:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:57,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:57,629 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:57,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:57,829 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 98 times [2021-06-05 07:11:57,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:57,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46606898] [2021-06-05 07:11:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:11:57,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:57,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46606898] [2021-06-05 07:11:57,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46606898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:57,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970529184] [2021-06-05 07:11:57,860 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 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 07:11:57,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:57,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:57,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:57,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:57,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970529184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:57,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:57,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:11:57,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121847903] [2021-06-05 07:11:57,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:57,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:57,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:57,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:57,966 INFO L87 Difference]: Start difference. First operand 11743 states and 44961 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:58,838 INFO L93 Difference]: Finished difference Result 20647 states and 75257 transitions. [2021-06-05 07:11:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:11:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:11:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:58,876 INFO L225 Difference]: With dead ends: 20647 [2021-06-05 07:11:58,876 INFO L226 Difference]: Without dead ends: 20643 [2021-06-05 07:11:58,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 538.4ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:11:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20643 states. [2021-06-05 07:11:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20643 to 11669. [2021-06-05 07:11:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11669 states, 11668 states have (on average 3.8328762427151184) internal successors, (44722), 11668 states have internal predecessors, (44722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 44722 transitions. [2021-06-05 07:11:59,149 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 44722 transitions. Word has length 28 [2021-06-05 07:11:59,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:59,149 INFO L482 AbstractCegarLoop]: Abstraction has 11669 states and 44722 transitions. [2021-06-05 07:11:59,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:11:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 44722 transitions. [2021-06-05 07:11:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:11:59,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:59,166 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:11:59,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:59,366 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:59,366 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 99 times [2021-06-05 07:11:59,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:59,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510765833] [2021-06-05 07:11:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:59,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:59,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510765833] [2021-06-05 07:11:59,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510765833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:59,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591837857] [2021-06-05 07:11:59,402 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 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 07:11:59,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:11:59,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:59,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:11:59,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:59,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591837857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:59,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:59,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:11:59,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971391126] [2021-06-05 07:11:59,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:11:59,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:59,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:11:59,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:11:59,509 INFO L87 Difference]: Start difference. First operand 11669 states and 44722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:12:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:00,435 INFO L93 Difference]: Finished difference Result 19952 states and 72022 transitions. [2021-06-05 07:12:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:12:00,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 07:12:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:00,472 INFO L225 Difference]: With dead ends: 19952 [2021-06-05 07:12:00,472 INFO L226 Difference]: Without dead ends: 19952 [2021-06-05 07:12:00,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 585.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 07:12:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19952 states. [2021-06-05 07:12:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19952 to 11896. [2021-06-05 07:12:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11896 states, 11895 states have (on average 3.8352248844052124) internal successors, (45620), 11895 states have internal predecessors, (45620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11896 states to 11896 states and 45620 transitions. [2021-06-05 07:12:00,749 INFO L78 Accepts]: Start accepts. Automaton has 11896 states and 45620 transitions. Word has length 28 [2021-06-05 07:12:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:00,749 INFO L482 AbstractCegarLoop]: Abstraction has 11896 states and 45620 transitions. [2021-06-05 07:12:00,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:12:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 11896 states and 45620 transitions. [2021-06-05 07:12:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:00,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:00,767 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:00,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-05 07:12:00,967 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:00,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 100 times [2021-06-05 07:12:00,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:00,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772060799] [2021-06-05 07:12:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:01,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:01,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772060799] [2021-06-05 07:12:01,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772060799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:01,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910654468] [2021-06-05 07:12:01,003 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 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 07:12:01,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:01,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:01,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:01,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:01,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910654468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:01,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:01,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:12:01,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959481456] [2021-06-05 07:12:01,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:12:01,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:01,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:12:01,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:12:01,102 INFO L87 Difference]: Start difference. First operand 11896 states and 45620 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:12:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:01,982 INFO L93 Difference]: Finished difference Result 19483 states and 70731 transitions. [2021-06-05 07:12:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:12:01,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 07:12:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:02,018 INFO L225 Difference]: With dead ends: 19483 [2021-06-05 07:12:02,018 INFO L226 Difference]: Without dead ends: 19471 [2021-06-05 07:12:02,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 504.2ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:12:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19471 states. [2021-06-05 07:12:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19471 to 11998. [2021-06-05 07:12:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11998 states, 11997 states have (on average 3.8295407185129617) internal successors, (45943), 11997 states have internal predecessors, (45943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11998 states to 11998 states and 45943 transitions. [2021-06-05 07:12:02,291 INFO L78 Accepts]: Start accepts. Automaton has 11998 states and 45943 transitions. Word has length 28 [2021-06-05 07:12:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:02,292 INFO L482 AbstractCegarLoop]: Abstraction has 11998 states and 45943 transitions. [2021-06-05 07:12:02,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:12:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 11998 states and 45943 transitions. [2021-06-05 07:12:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:02,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:02,309 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:02,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:02,510 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 77 times [2021-06-05 07:12:02,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:02,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333616544] [2021-06-05 07:12:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:02,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:02,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333616544] [2021-06-05 07:12:02,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333616544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:02,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141747628] [2021-06-05 07:12:02,547 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 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 07:12:02,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:12:02,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:02,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:02,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141747628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:02,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:02,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:12:02,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267814038] [2021-06-05 07:12:02,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:02,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:02,627 INFO L87 Difference]: Start difference. First operand 11998 states and 45943 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 07:12:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:03,062 INFO L93 Difference]: Finished difference Result 16918 states and 62875 transitions. [2021-06-05 07:12:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:12:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 07:12:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:03,094 INFO L225 Difference]: With dead ends: 16918 [2021-06-05 07:12:03,094 INFO L226 Difference]: Without dead ends: 16918 [2021-06-05 07:12:03,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:12:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16918 states. [2021-06-05 07:12:03,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16918 to 12070. [2021-06-05 07:12:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12070 states, 12069 states have (on average 3.824923357361836) internal successors, (46163), 12069 states have internal predecessors, (46163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12070 states to 12070 states and 46163 transitions. [2021-06-05 07:12:03,331 INFO L78 Accepts]: Start accepts. Automaton has 12070 states and 46163 transitions. Word has length 28 [2021-06-05 07:12:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:03,331 INFO L482 AbstractCegarLoop]: Abstraction has 12070 states and 46163 transitions. [2021-06-05 07:12:03,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 07:12:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 12070 states and 46163 transitions. [2021-06-05 07:12:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:03,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:03,349 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:03,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 07:12:03,549 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:03,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:03,550 INFO L82 PathProgramCache]: Analyzing trace with hash -869150583, now seen corresponding path program 78 times [2021-06-05 07:12:03,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:03,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822758492] [2021-06-05 07:12:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:03,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:03,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822758492] [2021-06-05 07:12:03,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822758492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:03,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020066253] [2021-06-05 07:12:03,580 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 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 07:12:03,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:12:03,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:03,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020066253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:03,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:03,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 07:12:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598789095] [2021-06-05 07:12:03,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:12:03,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:03,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:12:03,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:12:03,684 INFO L87 Difference]: Start difference. First operand 12070 states and 46163 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 07:12:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:04,105 INFO L93 Difference]: Finished difference Result 15210 states and 56302 transitions. [2021-06-05 07:12:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:12:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-06-05 07:12:04,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:04,133 INFO L225 Difference]: With dead ends: 15210 [2021-06-05 07:12:04,133 INFO L226 Difference]: Without dead ends: 15169 [2021-06-05 07:12:04,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:12:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15169 states. [2021-06-05 07:12:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15169 to 11722. [2021-06-05 07:12:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11722 states, 11721 states have (on average 3.8192133776981487) internal successors, (44765), 11721 states have internal predecessors, (44765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11722 states to 11722 states and 44765 transitions. [2021-06-05 07:12:04,341 INFO L78 Accepts]: Start accepts. Automaton has 11722 states and 44765 transitions. Word has length 28 [2021-06-05 07:12:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:04,341 INFO L482 AbstractCegarLoop]: Abstraction has 11722 states and 44765 transitions. [2021-06-05 07:12:04,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 07:12:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 11722 states and 44765 transitions. [2021-06-05 07:12:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:04,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:04,359 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:04,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 07:12:04,559 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:04,560 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 79 times [2021-06-05 07:12:04,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:04,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381315251] [2021-06-05 07:12:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:04,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:04,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381315251] [2021-06-05 07:12:04,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381315251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:04,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051832786] [2021-06-05 07:12:04,591 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 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 07:12:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:04,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:04,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051832786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:04,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:04,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:12:04,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291433433] [2021-06-05 07:12:04,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:12:04,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:04,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:12:04,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:12:04,669 INFO L87 Difference]: Start difference. First operand 11722 states and 44765 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 07:12:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:05,142 INFO L93 Difference]: Finished difference Result 17574 states and 64350 transitions. [2021-06-05 07:12:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:12:05,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-06-05 07:12:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:05,175 INFO L225 Difference]: With dead ends: 17574 [2021-06-05 07:12:05,175 INFO L226 Difference]: Without dead ends: 17574 [2021-06-05 07:12:05,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:12:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17574 states. [2021-06-05 07:12:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17574 to 12034. [2021-06-05 07:12:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12034 states, 12033 states have (on average 3.802626111526635) internal successors, (45757), 12033 states have internal predecessors, (45757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12034 states to 12034 states and 45757 transitions. [2021-06-05 07:12:05,437 INFO L78 Accepts]: Start accepts. Automaton has 12034 states and 45757 transitions. Word has length 28 [2021-06-05 07:12:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:05,437 INFO L482 AbstractCegarLoop]: Abstraction has 12034 states and 45757 transitions. [2021-06-05 07:12:05,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:12:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 12034 states and 45757 transitions. [2021-06-05 07:12:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:05,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:05,456 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:05,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 07:12:05,656 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:05,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1138878323, now seen corresponding path program 80 times [2021-06-05 07:12:05,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:05,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952600675] [2021-06-05 07:12:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:05,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:05,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952600675] [2021-06-05 07:12:05,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952600675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:05,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408238827] [2021-06-05 07:12:05,687 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 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 07:12:05,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:12:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:05,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:05,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408238827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:05,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:05,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 07:12:05,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304760221] [2021-06-05 07:12:05,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:12:05,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:05,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:12:05,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:12:05,795 INFO L87 Difference]: Start difference. First operand 12034 states and 45757 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 07:12:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:06,228 INFO L93 Difference]: Finished difference Result 16784 states and 62443 transitions. [2021-06-05 07:12:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:12:06,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-06-05 07:12:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:06,260 INFO L225 Difference]: With dead ends: 16784 [2021-06-05 07:12:06,261 INFO L226 Difference]: Without dead ends: 16774 [2021-06-05 07:12:06,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:12:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16774 states. [2021-06-05 07:12:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16774 to 14052. [2021-06-05 07:12:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14052 states, 14051 states have (on average 3.8370222759945913) internal successors, (53914), 14051 states have internal predecessors, (53914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14052 states to 14052 states and 53914 transitions. [2021-06-05 07:12:06,579 INFO L78 Accepts]: Start accepts. Automaton has 14052 states and 53914 transitions. Word has length 28 [2021-06-05 07:12:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:06,579 INFO L482 AbstractCegarLoop]: Abstraction has 14052 states and 53914 transitions. [2021-06-05 07:12:06,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 07:12:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 14052 states and 53914 transitions. [2021-06-05 07:12:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:06,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:06,600 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:06,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 07:12:06,801 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:06,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:06,801 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 81 times [2021-06-05 07:12:06,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:06,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115329309] [2021-06-05 07:12:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:06,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115329309] [2021-06-05 07:12:06,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115329309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449052571] [2021-06-05 07:12:06,832 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 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 07:12:06,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:12:06,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:06,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:06,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:06,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449052571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:06,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:06,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:12:06,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44150237] [2021-06-05 07:12:06,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:12:06,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:06,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:12:06,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:12:06,918 INFO L87 Difference]: Start difference. First operand 14052 states and 53914 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 07:12:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:07,350 INFO L93 Difference]: Finished difference Result 19306 states and 72104 transitions. [2021-06-05 07:12:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:12:07,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-06-05 07:12:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:07,389 INFO L225 Difference]: With dead ends: 19306 [2021-06-05 07:12:07,389 INFO L226 Difference]: Without dead ends: 19298 [2021-06-05 07:12:07,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:12:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19298 states. [2021-06-05 07:12:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19298 to 13972. [2021-06-05 07:12:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13972 states, 13971 states have (on average 3.8398110371483787) internal successors, (53646), 13971 states have internal predecessors, (53646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13972 states to 13972 states and 53646 transitions. [2021-06-05 07:12:07,695 INFO L78 Accepts]: Start accepts. Automaton has 13972 states and 53646 transitions. Word has length 28 [2021-06-05 07:12:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:07,696 INFO L482 AbstractCegarLoop]: Abstraction has 13972 states and 53646 transitions. [2021-06-05 07:12:07,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:12:07,696 INFO L276 IsEmpty]: Start isEmpty. Operand 13972 states and 53646 transitions. [2021-06-05 07:12:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:07,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:07,717 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:07,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:07,917 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:07,918 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 82 times [2021-06-05 07:12:07,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:07,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26370332] [2021-06-05 07:12:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:07,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:07,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26370332] [2021-06-05 07:12:07,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26370332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:07,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210955340] [2021-06-05 07:12:07,954 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 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 07:12:07,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:07,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:07,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:07,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:08,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210955340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:08,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:08,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:12:08,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995260829] [2021-06-05 07:12:08,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:08,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:08,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:08,028 INFO L87 Difference]: Start difference. First operand 13972 states and 53646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 07:12:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:08,429 INFO L93 Difference]: Finished difference Result 19186 states and 71752 transitions. [2021-06-05 07:12:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:12:08,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 07:12:08,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:08,466 INFO L225 Difference]: With dead ends: 19186 [2021-06-05 07:12:08,466 INFO L226 Difference]: Without dead ends: 19174 [2021-06-05 07:12:08,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:12:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19174 states. [2021-06-05 07:12:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19174 to 13938. [2021-06-05 07:12:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13938 states, 13937 states have (on average 3.841788046207936) internal successors, (53543), 13937 states have internal predecessors, (53543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13938 states to 13938 states and 53543 transitions. [2021-06-05 07:12:08,740 INFO L78 Accepts]: Start accepts. Automaton has 13938 states and 53543 transitions. Word has length 28 [2021-06-05 07:12:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:08,740 INFO L482 AbstractCegarLoop]: Abstraction has 13938 states and 53543 transitions. [2021-06-05 07:12:08,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 07:12:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 13938 states and 53543 transitions. [2021-06-05 07:12:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:08,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:08,761 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:08,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 07:12:08,961 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 83 times [2021-06-05 07:12:08,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:08,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945225883] [2021-06-05 07:12:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:08,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:08,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945225883] [2021-06-05 07:12:08,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945225883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:08,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651274053] [2021-06-05 07:12:08,994 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 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 07:12:09,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:12:09,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:09,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651274053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:09,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:09,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:12:09,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553563032] [2021-06-05 07:12:09,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:12:09,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:12:09,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:12:09,173 INFO L87 Difference]: Start difference. First operand 13938 states and 53543 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 07:12:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:10,018 INFO L93 Difference]: Finished difference Result 26084 states and 94333 transitions. [2021-06-05 07:12:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:12:10,018 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 28 [2021-06-05 07:12:10,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:10,068 INFO L225 Difference]: With dead ends: 26084 [2021-06-05 07:12:10,068 INFO L226 Difference]: Without dead ends: 26084 [2021-06-05 07:12:10,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:12:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26084 states. [2021-06-05 07:12:10,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26084 to 13918. [2021-06-05 07:12:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13918 states, 13917 states have (on average 3.840698426384997) internal successors, (53451), 13917 states have internal predecessors, (53451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 53451 transitions. [2021-06-05 07:12:10,387 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 53451 transitions. Word has length 28 [2021-06-05 07:12:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:10,387 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 53451 transitions. [2021-06-05 07:12:10,387 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 07:12:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 53451 transitions. [2021-06-05 07:12:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:10,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:10,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:10,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 07:12:10,608 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash 368022285, now seen corresponding path program 101 times [2021-06-05 07:12:10,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:10,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642686466] [2021-06-05 07:12:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:10,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:10,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642686466] [2021-06-05 07:12:10,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642686466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:10,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498963820] [2021-06-05 07:12:10,632 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 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 07:12:10,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:12:10,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:10,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:10,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498963820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:10,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:10,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:12:10,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377574832] [2021-06-05 07:12:10,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:12:10,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:10,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:12:10,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:12:10,731 INFO L87 Difference]: Start difference. First operand 13918 states and 53451 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 07:12:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:11,371 INFO L93 Difference]: Finished difference Result 21840 states and 79850 transitions. [2021-06-05 07:12:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:12:11,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-06-05 07:12:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:11,411 INFO L225 Difference]: With dead ends: 21840 [2021-06-05 07:12:11,411 INFO L226 Difference]: Without dead ends: 21827 [2021-06-05 07:12:11,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:12:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21827 states. [2021-06-05 07:12:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21827 to 15432. [2021-06-05 07:12:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15432 states, 15431 states have (on average 3.899293629706435) internal successors, (60170), 15431 states have internal predecessors, (60170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15432 states to 15432 states and 60170 transitions. [2021-06-05 07:12:11,819 INFO L78 Accepts]: Start accepts. Automaton has 15432 states and 60170 transitions. Word has length 28 [2021-06-05 07:12:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:11,819 INFO L482 AbstractCegarLoop]: Abstraction has 15432 states and 60170 transitions. [2021-06-05 07:12:11,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 07:12:11,819 INFO L276 IsEmpty]: Start isEmpty. Operand 15432 states and 60170 transitions. [2021-06-05 07:12:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:11,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:11,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:12,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 07:12:12,042 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:12,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435067, now seen corresponding path program 102 times [2021-06-05 07:12:12,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:12,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989655084] [2021-06-05 07:12:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:12,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989655084] [2021-06-05 07:12:12,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989655084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:12,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646682864] [2021-06-05 07:12:12,069 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 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 07:12:12,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:12:12,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:12,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:12,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646682864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:12,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:12,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:12:12,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131477919] [2021-06-05 07:12:12,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:12:12,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:12,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:12:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:12:12,174 INFO L87 Difference]: Start difference. First operand 15432 states and 60170 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 07:12:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:12,918 INFO L93 Difference]: Finished difference Result 22001 states and 80297 transitions. [2021-06-05 07:12:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:12:12,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-06-05 07:12:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:12,958 INFO L225 Difference]: With dead ends: 22001 [2021-06-05 07:12:12,958 INFO L226 Difference]: Without dead ends: 21986 [2021-06-05 07:12:12,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 394.7ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:12:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21986 states. [2021-06-05 07:12:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21986 to 15399. [2021-06-05 07:12:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15399 states, 15398 states have (on average 3.89829848032212) internal successors, (60026), 15398 states have internal predecessors, (60026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 60026 transitions. [2021-06-05 07:12:13,300 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 60026 transitions. Word has length 28 [2021-06-05 07:12:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:13,300 INFO L482 AbstractCegarLoop]: Abstraction has 15399 states and 60026 transitions. [2021-06-05 07:12:13,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 07:12:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 60026 transitions. [2021-06-05 07:12:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:13,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:13,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:13,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:13,522 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:13,523 INFO L82 PathProgramCache]: Analyzing trace with hash -774903755, now seen corresponding path program 103 times [2021-06-05 07:12:13,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:13,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163654101] [2021-06-05 07:12:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:13,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:13,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163654101] [2021-06-05 07:12:13,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163654101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:13,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450854315] [2021-06-05 07:12:13,547 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 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 07:12:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:13,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:13,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450854315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:13,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:13,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:12:13,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851934865] [2021-06-05 07:12:13,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:13,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:13,637 INFO L87 Difference]: Start difference. First operand 15399 states and 60026 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 07:12:14,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:14,221 INFO L93 Difference]: Finished difference Result 25011 states and 91344 transitions. [2021-06-05 07:12:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:12:14,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 28 [2021-06-05 07:12:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:14,270 INFO L225 Difference]: With dead ends: 25011 [2021-06-05 07:12:14,270 INFO L226 Difference]: Without dead ends: 24998 [2021-06-05 07:12:14,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:12:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24998 states. [2021-06-05 07:12:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24998 to 15493. [2021-06-05 07:12:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15493 states, 15492 states have (on average 3.904014975471211) internal successors, (60481), 15492 states have internal predecessors, (60481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15493 states to 15493 states and 60481 transitions. [2021-06-05 07:12:14,713 INFO L78 Accepts]: Start accepts. Automaton has 15493 states and 60481 transitions. Word has length 28 [2021-06-05 07:12:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:14,713 INFO L482 AbstractCegarLoop]: Abstraction has 15493 states and 60481 transitions. [2021-06-05 07:12:14,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 07:12:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 15493 states and 60481 transitions. [2021-06-05 07:12:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:14,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:14,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:14,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:14,936 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 104 times [2021-06-05 07:12:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:14,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878463189] [2021-06-05 07:12:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:14,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:14,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878463189] [2021-06-05 07:12:14,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878463189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:14,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025282586] [2021-06-05 07:12:14,960 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 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 07:12:14,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:12:14,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:14,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:14,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:15,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025282586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:15,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:15,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:12:15,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428972797] [2021-06-05 07:12:15,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:15,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:15,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:15,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:15,052 INFO L87 Difference]: Start difference. First operand 15493 states and 60481 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 07:12:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:15,682 INFO L93 Difference]: Finished difference Result 26795 states and 97004 transitions. [2021-06-05 07:12:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:12:15,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 28 [2021-06-05 07:12:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:15,736 INFO L225 Difference]: With dead ends: 26795 [2021-06-05 07:12:15,736 INFO L226 Difference]: Without dead ends: 26795 [2021-06-05 07:12:15,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:12:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26795 states. [2021-06-05 07:12:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26795 to 15546. [2021-06-05 07:12:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15546 states, 15545 states have (on average 3.900482470247668) internal successors, (60633), 15545 states have internal predecessors, (60633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 60633 transitions. [2021-06-05 07:12:16,117 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 60633 transitions. Word has length 28 [2021-06-05 07:12:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:16,117 INFO L482 AbstractCegarLoop]: Abstraction has 15546 states and 60633 transitions. [2021-06-05 07:12:16,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 07:12:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 60633 transitions. [2021-06-05 07:12:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:16,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:16,139 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:16,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:16,340 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:16,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 84 times [2021-06-05 07:12:16,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:16,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379117768] [2021-06-05 07:12:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:16,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:16,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379117768] [2021-06-05 07:12:16,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379117768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:16,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968564660] [2021-06-05 07:12:16,371 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 07:12:16,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:12:16,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:16,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:16,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:16,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968564660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:16,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:16,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:12:16,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67076919] [2021-06-05 07:12:16,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:12:16,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:16,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:12:16,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:12:16,462 INFO L87 Difference]: Start difference. First operand 15546 states and 60633 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 07:12:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:17,314 INFO L93 Difference]: Finished difference Result 26187 states and 97576 transitions. [2021-06-05 07:12:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:12:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-06-05 07:12:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:17,368 INFO L225 Difference]: With dead ends: 26187 [2021-06-05 07:12:17,368 INFO L226 Difference]: Without dead ends: 26183 [2021-06-05 07:12:17,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:12:17,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26183 states. [2021-06-05 07:12:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26183 to 15842. [2021-06-05 07:12:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 3.8898428129537277) internal successors, (61619), 15841 states have internal predecessors, (61619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 61619 transitions. [2021-06-05 07:12:17,805 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 61619 transitions. Word has length 28 [2021-06-05 07:12:17,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:17,806 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 61619 transitions. [2021-06-05 07:12:17,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 07:12:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 61619 transitions. [2021-06-05 07:12:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:17,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:17,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:18,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:18,033 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash -516108431, now seen corresponding path program 105 times [2021-06-05 07:12:18,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:18,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619492748] [2021-06-05 07:12:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:18,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:18,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619492748] [2021-06-05 07:12:18,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619492748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:18,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403991328] [2021-06-05 07:12:18,061 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 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 07:12:18,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:12:18,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:18,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:18,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:18,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403991328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:18,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:18,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:12:18,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926135534] [2021-06-05 07:12:18,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:18,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:18,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:18,145 INFO L87 Difference]: Start difference. First operand 15842 states and 61619 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:12:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:18,740 INFO L93 Difference]: Finished difference Result 23185 states and 86238 transitions. [2021-06-05 07:12:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:12:18,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 07:12:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:18,784 INFO L225 Difference]: With dead ends: 23185 [2021-06-05 07:12:18,784 INFO L226 Difference]: Without dead ends: 23162 [2021-06-05 07:12:18,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:12:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23162 states. [2021-06-05 07:12:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23162 to 15987. [2021-06-05 07:12:19,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15987 states, 15986 states have (on average 3.90191417490304) internal successors, (62376), 15986 states have internal predecessors, (62376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15987 states to 15987 states and 62376 transitions. [2021-06-05 07:12:19,130 INFO L78 Accepts]: Start accepts. Automaton has 15987 states and 62376 transitions. Word has length 28 [2021-06-05 07:12:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:19,130 INFO L482 AbstractCegarLoop]: Abstraction has 15987 states and 62376 transitions. [2021-06-05 07:12:19,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:12:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 15987 states and 62376 transitions. [2021-06-05 07:12:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:19,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:19,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:19,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 07:12:19,357 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 106 times [2021-06-05 07:12:19,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:19,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124836479] [2021-06-05 07:12:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:19,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:19,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124836479] [2021-06-05 07:12:19,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124836479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:19,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620846341] [2021-06-05 07:12:19,385 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 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 07:12:19,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:19,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:19,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:19,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620846341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:19,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:19,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:12:19,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071546735] [2021-06-05 07:12:19,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:19,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:19,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:19,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:19,476 INFO L87 Difference]: Start difference. First operand 15987 states and 62376 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:12:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:20,122 INFO L93 Difference]: Finished difference Result 22747 states and 83421 transitions. [2021-06-05 07:12:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:12:20,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 07:12:20,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:20,164 INFO L225 Difference]: With dead ends: 22747 [2021-06-05 07:12:20,164 INFO L226 Difference]: Without dead ends: 22747 [2021-06-05 07:12:20,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:12:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22747 states. [2021-06-05 07:12:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22747 to 16102. [2021-06-05 07:12:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16102 states, 16101 states have (on average 3.8941059561517917) internal successors, (62699), 16101 states have internal predecessors, (62699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16102 states to 16102 states and 62699 transitions. [2021-06-05 07:12:20,589 INFO L78 Accepts]: Start accepts. Automaton has 16102 states and 62699 transitions. Word has length 28 [2021-06-05 07:12:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:20,590 INFO L482 AbstractCegarLoop]: Abstraction has 16102 states and 62699 transitions. [2021-06-05 07:12:20,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:12:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 16102 states and 62699 transitions. [2021-06-05 07:12:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:20,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:20,612 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:20,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 07:12:20,812 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:20,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 107 times [2021-06-05 07:12:20,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:20,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977940651] [2021-06-05 07:12:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:20,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:20,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977940651] [2021-06-05 07:12:20,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977940651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:20,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414607221] [2021-06-05 07:12:20,841 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 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 07:12:20,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:12:20,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:20,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:20,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:20,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414607221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:20,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:20,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:12:20,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836663041] [2021-06-05 07:12:20,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:20,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:20,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:20,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:20,932 INFO L87 Difference]: Start difference. First operand 16102 states and 62699 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 07:12:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:21,534 INFO L93 Difference]: Finished difference Result 25248 states and 92992 transitions. [2021-06-05 07:12:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:12:21,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 07:12:21,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:21,585 INFO L225 Difference]: With dead ends: 25248 [2021-06-05 07:12:21,585 INFO L226 Difference]: Without dead ends: 25248 [2021-06-05 07:12:21,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:12:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25248 states. [2021-06-05 07:12:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25248 to 17267. [2021-06-05 07:12:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17267 states, 17266 states have (on average 3.875709486852774) internal successors, (66918), 17266 states have internal predecessors, (66918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17267 states to 17267 states and 66918 transitions. [2021-06-05 07:12:21,926 INFO L78 Accepts]: Start accepts. Automaton has 17267 states and 66918 transitions. Word has length 28 [2021-06-05 07:12:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:21,926 INFO L482 AbstractCegarLoop]: Abstraction has 17267 states and 66918 transitions. [2021-06-05 07:12:21,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 07:12:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17267 states and 66918 transitions. [2021-06-05 07:12:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:21,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:21,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:22,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 07:12:22,150 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 108 times [2021-06-05 07:12:22,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:22,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892738192] [2021-06-05 07:12:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:22,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:22,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892738192] [2021-06-05 07:12:22,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892738192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:22,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517177788] [2021-06-05 07:12:22,179 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 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 07:12:22,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:12:22,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:22,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:22,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517177788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:22,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:22,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:12:22,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397827110] [2021-06-05 07:12:22,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:12:22,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:22,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:12:22,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:12:22,277 INFO L87 Difference]: Start difference. First operand 17267 states and 66918 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 07:12:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:23,047 INFO L93 Difference]: Finished difference Result 28557 states and 103702 transitions. [2021-06-05 07:12:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:12:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-06-05 07:12:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:23,107 INFO L225 Difference]: With dead ends: 28557 [2021-06-05 07:12:23,107 INFO L226 Difference]: Without dead ends: 28557 [2021-06-05 07:12:23,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:12:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28557 states. [2021-06-05 07:12:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28557 to 17513. [2021-06-05 07:12:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17513 states, 17512 states have (on average 3.8901324805847417) internal successors, (68124), 17512 states have internal predecessors, (68124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17513 states to 17513 states and 68124 transitions. [2021-06-05 07:12:23,603 INFO L78 Accepts]: Start accepts. Automaton has 17513 states and 68124 transitions. Word has length 28 [2021-06-05 07:12:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:23,603 INFO L482 AbstractCegarLoop]: Abstraction has 17513 states and 68124 transitions. [2021-06-05 07:12:23,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 07:12:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 17513 states and 68124 transitions. [2021-06-05 07:12:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:23,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:23,629 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:23,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 07:12:23,829 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:23,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 85 times [2021-06-05 07:12:23,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:23,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866291425] [2021-06-05 07:12:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:23,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:23,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866291425] [2021-06-05 07:12:23,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866291425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:23,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451573994] [2021-06-05 07:12:23,876 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 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 07:12:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:23,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451573994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:23,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:23,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:12:23,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355251361] [2021-06-05 07:12:23,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:12:23,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:12:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:12:23,999 INFO L87 Difference]: Start difference. First operand 17513 states and 68124 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:12:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:25,434 INFO L93 Difference]: Finished difference Result 45668 states and 165537 transitions. [2021-06-05 07:12:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:12:25,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 07:12:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:25,537 INFO L225 Difference]: With dead ends: 45668 [2021-06-05 07:12:25,537 INFO L226 Difference]: Without dead ends: 45668 [2021-06-05 07:12:25,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 862.2ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:12:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45668 states. [2021-06-05 07:12:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45668 to 18875. [2021-06-05 07:12:26,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18875 states, 18874 states have (on average 3.927943202288863) internal successors, (74136), 18874 states have internal predecessors, (74136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18875 states to 18875 states and 74136 transitions. [2021-06-05 07:12:26,190 INFO L78 Accepts]: Start accepts. Automaton has 18875 states and 74136 transitions. Word has length 28 [2021-06-05 07:12:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:26,190 INFO L482 AbstractCegarLoop]: Abstraction has 18875 states and 74136 transitions. [2021-06-05 07:12:26,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:12:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 18875 states and 74136 transitions. [2021-06-05 07:12:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:26,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:26,219 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:26,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:26,419 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 86 times [2021-06-05 07:12:26,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:26,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116038730] [2021-06-05 07:12:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:26,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:26,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116038730] [2021-06-05 07:12:26,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116038730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:26,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201657616] [2021-06-05 07:12:26,451 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 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 07:12:26,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:12:26,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:26,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:26,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:26,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201657616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:26,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:26,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:12:26,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793358555] [2021-06-05 07:12:26,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:12:26,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:26,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:12:26,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:12:26,567 INFO L87 Difference]: Start difference. First operand 18875 states and 74136 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:12:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:27,995 INFO L93 Difference]: Finished difference Result 44591 states and 162736 transitions. [2021-06-05 07:12:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:12:27,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 07:12:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:28,095 INFO L225 Difference]: With dead ends: 44591 [2021-06-05 07:12:28,095 INFO L226 Difference]: Without dead ends: 44591 [2021-06-05 07:12:28,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:12:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44591 states. [2021-06-05 07:12:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44591 to 18843. [2021-06-05 07:12:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18843 states, 18842 states have (on average 3.924848742171744) internal successors, (73952), 18842 states have internal predecessors, (73952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18843 states to 18843 states and 73952 transitions. [2021-06-05 07:12:28,700 INFO L78 Accepts]: Start accepts. Automaton has 18843 states and 73952 transitions. Word has length 28 [2021-06-05 07:12:28,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:28,700 INFO L482 AbstractCegarLoop]: Abstraction has 18843 states and 73952 transitions. [2021-06-05 07:12:28,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:12:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 18843 states and 73952 transitions. [2021-06-05 07:12:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:28,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:28,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:28,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 07:12:28,927 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:28,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 109 times [2021-06-05 07:12:28,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:28,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989935018] [2021-06-05 07:12:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:28,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:28,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989935018] [2021-06-05 07:12:28,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989935018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:28,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540699836] [2021-06-05 07:12:28,967 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 07:12:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:28,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:28,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:29,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540699836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:29,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:29,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:12:29,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071242530] [2021-06-05 07:12:29,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:12:29,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:29,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:12:29,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:12:29,039 INFO L87 Difference]: Start difference. First operand 18843 states and 73952 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 07:12:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:29,306 INFO L93 Difference]: Finished difference Result 30303 states and 117561 transitions. [2021-06-05 07:12:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:12:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-05 07:12:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:29,374 INFO L225 Difference]: With dead ends: 30303 [2021-06-05 07:12:29,374 INFO L226 Difference]: Without dead ends: 30256 [2021-06-05 07:12:29,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:12:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30256 states. [2021-06-05 07:12:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30256 to 24046. [2021-06-05 07:12:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24046 states, 24045 states have (on average 3.9271782075275525) internal successors, (94429), 24045 states have internal predecessors, (94429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24046 states to 24046 states and 94429 transitions. [2021-06-05 07:12:29,836 INFO L78 Accepts]: Start accepts. Automaton has 24046 states and 94429 transitions. Word has length 28 [2021-06-05 07:12:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:29,836 INFO L482 AbstractCegarLoop]: Abstraction has 24046 states and 94429 transitions. [2021-06-05 07:12:29,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 07:12:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24046 states and 94429 transitions. [2021-06-05 07:12:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:29,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:29,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:30,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 07:12:30,069 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 110 times [2021-06-05 07:12:30,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:30,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913322614] [2021-06-05 07:12:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:30,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:30,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913322614] [2021-06-05 07:12:30,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913322614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:30,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013834627] [2021-06-05 07:12:30,095 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 07:12:30,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:12:30,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:30,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:30,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:30,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013834627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:30,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:30,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:12:30,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808897349] [2021-06-05 07:12:30,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:12:30,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:30,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:12:30,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:12:30,169 INFO L87 Difference]: Start difference. First operand 24046 states and 94429 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 07:12:30,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:30,423 INFO L93 Difference]: Finished difference Result 26794 states and 102777 transitions. [2021-06-05 07:12:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:12:30,424 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 28 [2021-06-05 07:12:30,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:30,481 INFO L225 Difference]: With dead ends: 26794 [2021-06-05 07:12:30,481 INFO L226 Difference]: Without dead ends: 26794 [2021-06-05 07:12:30,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:12:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-06-05 07:12:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 23549. [2021-06-05 07:12:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23549 states, 23548 states have (on average 3.9178274163410904) internal successors, (92257), 23548 states have internal predecessors, (92257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23549 states to 23549 states and 92257 transitions. [2021-06-05 07:12:30,991 INFO L78 Accepts]: Start accepts. Automaton has 23549 states and 92257 transitions. Word has length 28 [2021-06-05 07:12:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:30,991 INFO L482 AbstractCegarLoop]: Abstraction has 23549 states and 92257 transitions. [2021-06-05 07:12:30,991 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 07:12:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 23549 states and 92257 transitions. [2021-06-05 07:12:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:31,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:31,023 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:31,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 07:12:31,224 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 111 times [2021-06-05 07:12:31,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:31,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181122092] [2021-06-05 07:12:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:31,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:31,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181122092] [2021-06-05 07:12:31,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181122092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:31,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276020485] [2021-06-05 07:12:31,257 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 07:12:31,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:12:31,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:31,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276020485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:31,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:31,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 07:12:31,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020415228] [2021-06-05 07:12:31,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:12:31,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:31,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:12:31,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:12:31,353 INFO L87 Difference]: Start difference. First operand 23549 states and 92257 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 07:12:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:32,172 INFO L93 Difference]: Finished difference Result 36148 states and 135030 transitions. [2021-06-05 07:12:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:12:32,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-06-05 07:12:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:32,250 INFO L225 Difference]: With dead ends: 36148 [2021-06-05 07:12:32,251 INFO L226 Difference]: Without dead ends: 36148 [2021-06-05 07:12:32,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:12:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36148 states. [2021-06-05 07:12:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36148 to 23617. [2021-06-05 07:12:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23617 states, 23616 states have (on average 3.915989159891599) internal successors, (92480), 23616 states have internal predecessors, (92480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23617 states to 23617 states and 92480 transitions. [2021-06-05 07:12:32,790 INFO L78 Accepts]: Start accepts. Automaton has 23617 states and 92480 transitions. Word has length 28 [2021-06-05 07:12:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:32,791 INFO L482 AbstractCegarLoop]: Abstraction has 23617 states and 92480 transitions. [2021-06-05 07:12:32,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 07:12:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 23617 states and 92480 transitions. [2021-06-05 07:12:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:32,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:32,825 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:33,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:33,026 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:33,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 112 times [2021-06-05 07:12:33,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:33,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225953246] [2021-06-05 07:12:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:33,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:33,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225953246] [2021-06-05 07:12:33,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225953246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:33,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051518977] [2021-06-05 07:12:33,058 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 07:12:33,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:33,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:33,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:33,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:33,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051518977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:33,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:33,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:12:33,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003617716] [2021-06-05 07:12:33,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:12:33,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:33,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:12:33,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:12:33,164 INFO L87 Difference]: Start difference. First operand 23617 states and 92480 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 07:12:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:34,569 INFO L93 Difference]: Finished difference Result 46617 states and 172038 transitions. [2021-06-05 07:12:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:12:34,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-06-05 07:12:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:34,671 INFO L225 Difference]: With dead ends: 46617 [2021-06-05 07:12:34,671 INFO L226 Difference]: Without dead ends: 46617 [2021-06-05 07:12:34,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 787.7ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 07:12:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46617 states. [2021-06-05 07:12:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46617 to 23616. [2021-06-05 07:12:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23616 states, 23615 states have (on average 3.9178488248994285) internal successors, (92520), 23615 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23616 states to 23616 states and 92520 transitions. [2021-06-05 07:12:35,329 INFO L78 Accepts]: Start accepts. Automaton has 23616 states and 92520 transitions. Word has length 28 [2021-06-05 07:12:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:35,329 INFO L482 AbstractCegarLoop]: Abstraction has 23616 states and 92520 transitions. [2021-06-05 07:12:35,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 07:12:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 23616 states and 92520 transitions. [2021-06-05 07:12:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:35,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:35,361 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:35,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:35,562 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 113 times [2021-06-05 07:12:35,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:35,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092134411] [2021-06-05 07:12:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:35,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:35,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092134411] [2021-06-05 07:12:35,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092134411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:35,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838883486] [2021-06-05 07:12:35,596 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 07:12:35,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:12:35,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:35,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:35,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838883486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:35,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:35,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:12:35,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103124234] [2021-06-05 07:12:35,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:12:35,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:35,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:12:35,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:12:35,702 INFO L87 Difference]: Start difference. First operand 23616 states and 92520 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 07:12:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:36,973 INFO L93 Difference]: Finished difference Result 46345 states and 171695 transitions. [2021-06-05 07:12:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:12:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-06-05 07:12:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:37,073 INFO L225 Difference]: With dead ends: 46345 [2021-06-05 07:12:37,073 INFO L226 Difference]: Without dead ends: 46345 [2021-06-05 07:12:37,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 07:12:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46345 states. [2021-06-05 07:12:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46345 to 23400. [2021-06-05 07:12:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23400 states, 23399 states have (on average 3.9111927860164966) internal successors, (91518), 23399 states have internal predecessors, (91518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23400 states to 23400 states and 91518 transitions. [2021-06-05 07:12:37,855 INFO L78 Accepts]: Start accepts. Automaton has 23400 states and 91518 transitions. Word has length 28 [2021-06-05 07:12:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:37,855 INFO L482 AbstractCegarLoop]: Abstraction has 23400 states and 91518 transitions. [2021-06-05 07:12:37,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 07:12:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 23400 states and 91518 transitions. [2021-06-05 07:12:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:37,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:37,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:38,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 07:12:38,090 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 114 times [2021-06-05 07:12:38,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:38,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306059280] [2021-06-05 07:12:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:38,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:38,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306059280] [2021-06-05 07:12:38,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306059280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:38,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250009327] [2021-06-05 07:12:38,116 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 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 07:12:38,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:12:38,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:12:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:12:38,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250009327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:38,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:38,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:12:38,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611610740] [2021-06-05 07:12:38,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:12:38,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:38,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:12:38,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:12:38,190 INFO L87 Difference]: Start difference. First operand 23400 states and 91518 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 07:12:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:38,457 INFO L93 Difference]: Finished difference Result 35770 states and 134580 transitions. [2021-06-05 07:12:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:12:38,458 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 28 [2021-06-05 07:12:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:38,534 INFO L225 Difference]: With dead ends: 35770 [2021-06-05 07:12:38,534 INFO L226 Difference]: Without dead ends: 35753 [2021-06-05 07:12:38,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:12:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35753 states. [2021-06-05 07:12:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35753 to 23671. [2021-06-05 07:12:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23671 states, 23670 states have (on average 3.9156738487536966) internal successors, (92684), 23670 states have internal predecessors, (92684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23671 states to 23671 states and 92684 transitions. [2021-06-05 07:12:39,044 INFO L78 Accepts]: Start accepts. Automaton has 23671 states and 92684 transitions. Word has length 28 [2021-06-05 07:12:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:39,044 INFO L482 AbstractCegarLoop]: Abstraction has 23671 states and 92684 transitions. [2021-06-05 07:12:39,044 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 07:12:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 23671 states and 92684 transitions. [2021-06-05 07:12:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:39,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:39,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:39,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 07:12:39,278 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:39,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 115 times [2021-06-05 07:12:39,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:39,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498355073] [2021-06-05 07:12:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:39,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:39,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498355073] [2021-06-05 07:12:39,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498355073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:39,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636807959] [2021-06-05 07:12:39,304 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 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 07:12:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:39,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:12:39,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:12:39,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636807959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:39,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:39,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:12:39,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308744293] [2021-06-05 07:12:39,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:12:39,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:39,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:12:39,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:12:39,380 INFO L87 Difference]: Start difference. First operand 23671 states and 92684 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 07:12:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:39,652 INFO L93 Difference]: Finished difference Result 37952 states and 141497 transitions. [2021-06-05 07:12:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:12:39,652 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 28 [2021-06-05 07:12:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:39,733 INFO L225 Difference]: With dead ends: 37952 [2021-06-05 07:12:39,733 INFO L226 Difference]: Without dead ends: 37952 [2021-06-05 07:12:39,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:12:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37952 states. [2021-06-05 07:12:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37952 to 23340. [2021-06-05 07:12:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23340 states, 23339 states have (on average 3.903252067355071) internal successors, (91098), 23339 states have internal predecessors, (91098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23340 states to 23340 states and 91098 transitions. [2021-06-05 07:12:40,426 INFO L78 Accepts]: Start accepts. Automaton has 23340 states and 91098 transitions. Word has length 28 [2021-06-05 07:12:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:40,426 INFO L482 AbstractCegarLoop]: Abstraction has 23340 states and 91098 transitions. [2021-06-05 07:12:40,426 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 07:12:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 23340 states and 91098 transitions. [2021-06-05 07:12:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:40,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:40,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:40,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 07:12:40,665 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 116 times [2021-06-05 07:12:40,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:40,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410252066] [2021-06-05 07:12:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:40,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:40,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410252066] [2021-06-05 07:12:40,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410252066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:40,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727777010] [2021-06-05 07:12:40,698 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 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 07:12:40,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:12:40,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:40,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727777010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:40,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:40,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:12:40,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470468134] [2021-06-05 07:12:40,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:12:40,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:12:40,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:12:40,789 INFO L87 Difference]: Start difference. First operand 23340 states and 91098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:12:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:41,519 INFO L93 Difference]: Finished difference Result 33275 states and 124927 transitions. [2021-06-05 07:12:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:12:41,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-05 07:12:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:41,591 INFO L225 Difference]: With dead ends: 33275 [2021-06-05 07:12:41,591 INFO L226 Difference]: Without dead ends: 33275 [2021-06-05 07:12:41,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:12:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33275 states. [2021-06-05 07:12:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33275 to 23388. [2021-06-05 07:12:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23388 states, 23387 states have (on average 3.9018258006584854) internal successors, (91252), 23387 states have internal predecessors, (91252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23388 states to 23388 states and 91252 transitions. [2021-06-05 07:12:42,117 INFO L78 Accepts]: Start accepts. Automaton has 23388 states and 91252 transitions. Word has length 28 [2021-06-05 07:12:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:42,117 INFO L482 AbstractCegarLoop]: Abstraction has 23388 states and 91252 transitions. [2021-06-05 07:12:42,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:12:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 23388 states and 91252 transitions. [2021-06-05 07:12:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:42,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:42,148 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:42,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 07:12:42,348 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:42,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:42,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 117 times [2021-06-05 07:12:42,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:42,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377937016] [2021-06-05 07:12:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:42,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:42,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377937016] [2021-06-05 07:12:42,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377937016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:42,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952197477] [2021-06-05 07:12:42,382 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 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 07:12:42,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:12:42,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:42,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:42,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:42,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952197477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:42,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:42,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:12:42,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809216267] [2021-06-05 07:12:42,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:12:42,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:12:42,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:12:42,471 INFO L87 Difference]: Start difference. First operand 23388 states and 91252 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:12:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:43,337 INFO L93 Difference]: Finished difference Result 34959 states and 129812 transitions. [2021-06-05 07:12:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:12:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-05 07:12:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:43,412 INFO L225 Difference]: With dead ends: 34959 [2021-06-05 07:12:43,412 INFO L226 Difference]: Without dead ends: 34959 [2021-06-05 07:12:43,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:12:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34959 states. [2021-06-05 07:12:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34959 to 23950. [2021-06-05 07:12:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23950 states, 23949 states have (on average 3.882625579356132) internal successors, (92985), 23949 states have internal predecessors, (92985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23950 states to 23950 states and 92985 transitions. [2021-06-05 07:12:44,121 INFO L78 Accepts]: Start accepts. Automaton has 23950 states and 92985 transitions. Word has length 28 [2021-06-05 07:12:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:44,121 INFO L482 AbstractCegarLoop]: Abstraction has 23950 states and 92985 transitions. [2021-06-05 07:12:44,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:12:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23950 states and 92985 transitions. [2021-06-05 07:12:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:44,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:44,157 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:44,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 07:12:44,358 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 118 times [2021-06-05 07:12:44,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:44,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255676579] [2021-06-05 07:12:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:44,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:44,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255676579] [2021-06-05 07:12:44,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255676579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:44,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093744020] [2021-06-05 07:12:44,401 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 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 07:12:44,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:44,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:44,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:44,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093744020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:44,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:44,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:12:44,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79250900] [2021-06-05 07:12:44,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:12:44,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:44,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:12:44,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:12:44,492 INFO L87 Difference]: Start difference. First operand 23950 states and 92985 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:12:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:45,350 INFO L93 Difference]: Finished difference Result 34019 states and 127355 transitions. [2021-06-05 07:12:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:12:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-05 07:12:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:45,428 INFO L225 Difference]: With dead ends: 34019 [2021-06-05 07:12:45,428 INFO L226 Difference]: Without dead ends: 34015 [2021-06-05 07:12:45,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:12:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34015 states. [2021-06-05 07:12:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34015 to 23842. [2021-06-05 07:12:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23842 states, 23841 states have (on average 3.885113879451365) internal successors, (92625), 23841 states have internal predecessors, (92625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 92625 transitions. [2021-06-05 07:12:46,002 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 92625 transitions. Word has length 28 [2021-06-05 07:12:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:46,002 INFO L482 AbstractCegarLoop]: Abstraction has 23842 states and 92625 transitions. [2021-06-05 07:12:46,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:12:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 92625 transitions. [2021-06-05 07:12:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:46,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:46,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:46,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:46,237 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 119 times [2021-06-05 07:12:46,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:46,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814249450] [2021-06-05 07:12:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:46,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:46,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814249450] [2021-06-05 07:12:46,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814249450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:46,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204872324] [2021-06-05 07:12:46,262 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 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 07:12:46,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:12:46,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:46,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:12:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:12:46,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204872324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:46,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:46,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 07:12:46,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736651910] [2021-06-05 07:12:46,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:12:46,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:12:46,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:12:46,340 INFO L87 Difference]: Start difference. First operand 23842 states and 92625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 07:12:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:46,572 INFO L93 Difference]: Finished difference Result 30199 states and 113195 transitions. [2021-06-05 07:12:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:12:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 28 [2021-06-05 07:12:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:46,636 INFO L225 Difference]: With dead ends: 30199 [2021-06-05 07:12:46,636 INFO L226 Difference]: Without dead ends: 30199 [2021-06-05 07:12:46,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:12:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30199 states. [2021-06-05 07:12:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30199 to 24152. [2021-06-05 07:12:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24152 states, 24151 states have (on average 3.87718935033746) internal successors, (93638), 24151 states have internal predecessors, (93638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 93638 transitions. [2021-06-05 07:12:47,084 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 93638 transitions. Word has length 28 [2021-06-05 07:12:47,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:47,084 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 93638 transitions. [2021-06-05 07:12:47,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 07:12:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 93638 transitions. [2021-06-05 07:12:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:47,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:47,117 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:47,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 07:12:47,317 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:47,318 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 120 times [2021-06-05 07:12:47,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:47,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733731598] [2021-06-05 07:12:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:47,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:47,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733731598] [2021-06-05 07:12:47,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733731598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:47,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383102518] [2021-06-05 07:12:47,351 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 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 07:12:47,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:12:47,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:47,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:12:47,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383102518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:47,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:47,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:12:47,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118322807] [2021-06-05 07:12:47,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:47,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:47,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:47,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:47,433 INFO L87 Difference]: Start difference. First operand 24152 states and 93638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:12:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:48,230 INFO L93 Difference]: Finished difference Result 35046 states and 129747 transitions. [2021-06-05 07:12:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:12:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:12:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:48,309 INFO L225 Difference]: With dead ends: 35046 [2021-06-05 07:12:48,309 INFO L226 Difference]: Without dead ends: 35046 [2021-06-05 07:12:48,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:12:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35046 states. [2021-06-05 07:12:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35046 to 25935. [2021-06-05 07:12:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.8859026760237527) internal successors, (100777), 25934 states have internal predecessors, (100777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 100777 transitions. [2021-06-05 07:12:48,921 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 100777 transitions. Word has length 28 [2021-06-05 07:12:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:48,921 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 100777 transitions. [2021-06-05 07:12:48,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:12:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 100777 transitions. [2021-06-05 07:12:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:48,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:48,958 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:49,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 07:12:49,158 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:49,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:49,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 121 times [2021-06-05 07:12:49,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:49,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205098587] [2021-06-05 07:12:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:49,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205098587] [2021-06-05 07:12:49,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205098587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022878893] [2021-06-05 07:12:49,191 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 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 07:12:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:49,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:12:49,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022878893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:49,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:49,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:12:49,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657636300] [2021-06-05 07:12:49,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:49,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:49,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:49,266 INFO L87 Difference]: Start difference. First operand 25935 states and 100777 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:12:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:49,909 INFO L93 Difference]: Finished difference Result 33305 states and 125259 transitions. [2021-06-05 07:12:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:12:49,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:12:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:49,981 INFO L225 Difference]: With dead ends: 33305 [2021-06-05 07:12:49,981 INFO L226 Difference]: Without dead ends: 33293 [2021-06-05 07:12:49,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:12:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33293 states. [2021-06-05 07:12:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33293 to 26101. [2021-06-05 07:12:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26101 states, 26100 states have (on average 3.880842911877395) internal successors, (101290), 26100 states have internal predecessors, (101290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26101 states to 26101 states and 101290 transitions. [2021-06-05 07:12:50,565 INFO L78 Accepts]: Start accepts. Automaton has 26101 states and 101290 transitions. Word has length 28 [2021-06-05 07:12:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:50,565 INFO L482 AbstractCegarLoop]: Abstraction has 26101 states and 101290 transitions. [2021-06-05 07:12:50,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:12:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 26101 states and 101290 transitions. [2021-06-05 07:12:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:50,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:50,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:50,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:50,803 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 122 times [2021-06-05 07:12:50,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:50,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690180629] [2021-06-05 07:12:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:50,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:50,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690180629] [2021-06-05 07:12:50,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690180629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:50,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111272860] [2021-06-05 07:12:50,829 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 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 07:12:50,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:12:50,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:12:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:12:50,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111272860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:50,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:50,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:12:50,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213209836] [2021-06-05 07:12:50,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:12:50,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:50,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:12:50,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:12:50,899 INFO L87 Difference]: Start difference. First operand 26101 states and 101290 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 07:12:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:51,142 INFO L93 Difference]: Finished difference Result 30661 states and 116866 transitions. [2021-06-05 07:12:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:12:51,142 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 28 [2021-06-05 07:12:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:51,208 INFO L225 Difference]: With dead ends: 30661 [2021-06-05 07:12:51,208 INFO L226 Difference]: Without dead ends: 30661 [2021-06-05 07:12:51,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:12:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30661 states. [2021-06-05 07:12:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30661 to 27307. [2021-06-05 07:12:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27307 states, 27306 states have (on average 3.8768402548890353) internal successors, (105861), 27306 states have internal predecessors, (105861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27307 states to 27307 states and 105861 transitions. [2021-06-05 07:12:51,886 INFO L78 Accepts]: Start accepts. Automaton has 27307 states and 105861 transitions. Word has length 28 [2021-06-05 07:12:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:51,886 INFO L482 AbstractCegarLoop]: Abstraction has 27307 states and 105861 transitions. [2021-06-05 07:12:51,886 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 07:12:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 27307 states and 105861 transitions. [2021-06-05 07:12:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:51,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:51,928 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:52,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:52,128 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:52,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 123 times [2021-06-05 07:12:52,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:52,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233101633] [2021-06-05 07:12:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:52,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:52,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233101633] [2021-06-05 07:12:52,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233101633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:52,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735687215] [2021-06-05 07:12:52,168 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 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 07:12:52,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:12:52,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:52,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:52,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735687215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:52,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:52,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:12:52,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696736392] [2021-06-05 07:12:52,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:12:52,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:12:52,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:12:52,252 INFO L87 Difference]: Start difference. First operand 27307 states and 105861 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 07:12:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:52,954 INFO L93 Difference]: Finished difference Result 35422 states and 132065 transitions. [2021-06-05 07:12:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:12:52,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 07:12:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:53,028 INFO L225 Difference]: With dead ends: 35422 [2021-06-05 07:12:53,028 INFO L226 Difference]: Without dead ends: 35422 [2021-06-05 07:12:53,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:12:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-06-05 07:12:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28503. [2021-06-05 07:12:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28503 states, 28502 states have (on average 3.847694898603607) internal successors, (109667), 28502 states have internal predecessors, (109667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28503 states to 28503 states and 109667 transitions. [2021-06-05 07:12:53,628 INFO L78 Accepts]: Start accepts. Automaton has 28503 states and 109667 transitions. Word has length 28 [2021-06-05 07:12:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:53,628 INFO L482 AbstractCegarLoop]: Abstraction has 28503 states and 109667 transitions. [2021-06-05 07:12:53,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 07:12:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 28503 states and 109667 transitions. [2021-06-05 07:12:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:53,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:53,671 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:53,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:53,871 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:53,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:53,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 124 times [2021-06-05 07:12:53,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:53,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165228078] [2021-06-05 07:12:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:53,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:53,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165228078] [2021-06-05 07:12:53,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165228078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:53,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112242138] [2021-06-05 07:12:53,908 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 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 07:12:53,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:12:53,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:53,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:53,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:53,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112242138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:53,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:53,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:12:53,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098903629] [2021-06-05 07:12:53,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:12:53,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:53,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:12:53,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:12:53,981 INFO L87 Difference]: Start difference. First operand 28503 states and 109667 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 07:12:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:54,525 INFO L93 Difference]: Finished difference Result 34544 states and 129722 transitions. [2021-06-05 07:12:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:12:54,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-06-05 07:12:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:54,601 INFO L225 Difference]: With dead ends: 34544 [2021-06-05 07:12:54,601 INFO L226 Difference]: Without dead ends: 34536 [2021-06-05 07:12:54,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:12:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34536 states. [2021-06-05 07:12:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34536 to 28309. [2021-06-05 07:12:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28309 states, 28308 states have (on average 3.853610286844708) internal successors, (109088), 28308 states have internal predecessors, (109088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 109088 transitions. [2021-06-05 07:12:55,202 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 109088 transitions. Word has length 28 [2021-06-05 07:12:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:55,202 INFO L482 AbstractCegarLoop]: Abstraction has 28309 states and 109088 transitions. [2021-06-05 07:12:55,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:12:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 109088 transitions. [2021-06-05 07:12:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:55,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:55,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:12:55,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:55,447 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:55,447 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 125 times [2021-06-05 07:12:55,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:55,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497520644] [2021-06-05 07:12:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:55,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:55,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497520644] [2021-06-05 07:12:55,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497520644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:55,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977137940] [2021-06-05 07:12:55,476 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 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 07:12:55,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:12:55,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:55,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:12:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:55,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977137940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:55,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:55,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:12:55,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899246619] [2021-06-05 07:12:55,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:12:55,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:55,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:12:55,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:12:55,556 INFO L87 Difference]: Start difference. First operand 28309 states and 109088 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 07:12:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:56,290 INFO L93 Difference]: Finished difference Result 36390 states and 135344 transitions. [2021-06-05 07:12:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:12:56,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-06-05 07:12:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:56,368 INFO L225 Difference]: With dead ends: 36390 [2021-06-05 07:12:56,368 INFO L226 Difference]: Without dead ends: 36390 [2021-06-05 07:12:56,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:12:56,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36390 states. [2021-06-05 07:12:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36390 to 29319. [2021-06-05 07:12:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29319 states, 29318 states have (on average 3.831741592195921) internal successors, (112339), 29318 states have internal predecessors, (112339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29319 states to 29319 states and 112339 transitions. [2021-06-05 07:12:56,995 INFO L78 Accepts]: Start accepts. Automaton has 29319 states and 112339 transitions. Word has length 28 [2021-06-05 07:12:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:56,995 INFO L482 AbstractCegarLoop]: Abstraction has 29319 states and 112339 transitions. [2021-06-05 07:12:56,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:12:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 29319 states and 112339 transitions. [2021-06-05 07:12:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:57,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:57,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:57,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 07:12:57,239 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:57,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1055976179, now seen corresponding path program 126 times [2021-06-05 07:12:57,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:57,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959589745] [2021-06-05 07:12:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:57,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959589745] [2021-06-05 07:12:57,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959589745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:57,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571908468] [2021-06-05 07:12:57,269 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 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 07:12:57,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:12:57,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:12:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:57,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:57,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571908468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:57,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:57,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:12:57,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289355699] [2021-06-05 07:12:57,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:12:57,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:57,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:12:57,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:12:57,337 INFO L87 Difference]: Start difference. First operand 29319 states and 112339 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 07:12:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:57,662 INFO L93 Difference]: Finished difference Result 35637 states and 135551 transitions. [2021-06-05 07:12:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:12:57,663 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 28 [2021-06-05 07:12:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:57,739 INFO L225 Difference]: With dead ends: 35637 [2021-06-05 07:12:57,740 INFO L226 Difference]: Without dead ends: 35624 [2021-06-05 07:12:57,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:12:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35624 states. [2021-06-05 07:12:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35624 to 34097. [2021-06-05 07:12:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34097 states, 34096 states have (on average 3.845964335992492) internal successors, (131132), 34096 states have internal predecessors, (131132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34097 states to 34097 states and 131132 transitions. [2021-06-05 07:12:58,378 INFO L78 Accepts]: Start accepts. Automaton has 34097 states and 131132 transitions. Word has length 28 [2021-06-05 07:12:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:58,379 INFO L482 AbstractCegarLoop]: Abstraction has 34097 states and 131132 transitions. [2021-06-05 07:12:58,379 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 07:12:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 34097 states and 131132 transitions. [2021-06-05 07:12:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:58,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:58,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:12:58,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:12:58,629 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:12:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:12:58,630 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 127 times [2021-06-05 07:12:58,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:12:58,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377615924] [2021-06-05 07:12:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:12:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:58,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:12:58,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377615924] [2021-06-05 07:12:58,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377615924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:58,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244334109] [2021-06-05 07:12:58,659 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 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 07:12:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:12:58,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:12:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:12:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:12:58,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244334109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:12:58,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:12:58,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:12:58,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818518242] [2021-06-05 07:12:58,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:12:58,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:12:58,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:12:58,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:12:58,728 INFO L87 Difference]: Start difference. First operand 34097 states and 131132 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 07:12:59,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:12:59,053 INFO L93 Difference]: Finished difference Result 37254 states and 141034 transitions. [2021-06-05 07:12:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:12:59,053 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 28 [2021-06-05 07:12:59,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:12:59,134 INFO L225 Difference]: With dead ends: 37254 [2021-06-05 07:12:59,134 INFO L226 Difference]: Without dead ends: 37254 [2021-06-05 07:12:59,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:12:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37254 states. [2021-06-05 07:12:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37254 to 33774. [2021-06-05 07:12:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33774 states, 33773 states have (on average 3.8422704527285108) internal successors, (129765), 33773 states have internal predecessors, (129765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:12:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33774 states to 33774 states and 129765 transitions. [2021-06-05 07:12:59,893 INFO L78 Accepts]: Start accepts. Automaton has 33774 states and 129765 transitions. Word has length 28 [2021-06-05 07:12:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:12:59,893 INFO L482 AbstractCegarLoop]: Abstraction has 33774 states and 129765 transitions. [2021-06-05 07:12:59,893 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 07:12:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 33774 states and 129765 transitions. [2021-06-05 07:12:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:12:59,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:12:59,944 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:00,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 07:13:00,145 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 128 times [2021-06-05 07:13:00,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:00,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837171569] [2021-06-05 07:13:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:00,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:00,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837171569] [2021-06-05 07:13:00,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837171569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:00,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625510407] [2021-06-05 07:13:00,174 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 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 07:13:00,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:13:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:00,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:00,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:00,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625510407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:00,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:00,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:13:00,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292386857] [2021-06-05 07:13:00,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:13:00,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:00,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:13:00,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:13:00,247 INFO L87 Difference]: Start difference. First operand 33774 states and 129765 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 07:13:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:00,814 INFO L93 Difference]: Finished difference Result 40558 states and 152173 transitions. [2021-06-05 07:13:00,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:13:00,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-06-05 07:13:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:00,902 INFO L225 Difference]: With dead ends: 40558 [2021-06-05 07:13:00,902 INFO L226 Difference]: Without dead ends: 40550 [2021-06-05 07:13:00,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:13:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40550 states. [2021-06-05 07:13:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40550 to 33740. [2021-06-05 07:13:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33740 states, 33739 states have (on average 3.8426746495153976) internal successors, (129648), 33739 states have internal predecessors, (129648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33740 states to 33740 states and 129648 transitions. [2021-06-05 07:13:01,610 INFO L78 Accepts]: Start accepts. Automaton has 33740 states and 129648 transitions. Word has length 28 [2021-06-05 07:13:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:01,610 INFO L482 AbstractCegarLoop]: Abstraction has 33740 states and 129648 transitions. [2021-06-05 07:13:01,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:13:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 33740 states and 129648 transitions. [2021-06-05 07:13:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:01,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:01,659 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:01,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:01,860 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 129 times [2021-06-05 07:13:01,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:01,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171276016] [2021-06-05 07:13:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:13:01,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:01,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171276016] [2021-06-05 07:13:01,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171276016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:01,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118261190] [2021-06-05 07:13:01,890 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 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 07:13:01,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:13:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:01,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:13:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:13:01,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118261190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:01,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:01,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:13:01,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135793340] [2021-06-05 07:13:01,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:13:01,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:13:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:13:01,960 INFO L87 Difference]: Start difference. First operand 33740 states and 129648 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 07:13:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:02,364 INFO L93 Difference]: Finished difference Result 36656 states and 139373 transitions. [2021-06-05 07:13:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:13:02,365 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 28 [2021-06-05 07:13:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:02,446 INFO L225 Difference]: With dead ends: 36656 [2021-06-05 07:13:02,446 INFO L226 Difference]: Without dead ends: 36656 [2021-06-05 07:13:02,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:13:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36656 states. [2021-06-05 07:13:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36656 to 34272. [2021-06-05 07:13:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34272 states, 34271 states have (on average 3.8409150593796504) internal successors, (131632), 34271 states have internal predecessors, (131632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34272 states to 34272 states and 131632 transitions. [2021-06-05 07:13:03,241 INFO L78 Accepts]: Start accepts. Automaton has 34272 states and 131632 transitions. Word has length 28 [2021-06-05 07:13:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:03,241 INFO L482 AbstractCegarLoop]: Abstraction has 34272 states and 131632 transitions. [2021-06-05 07:13:03,241 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 07:13:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 34272 states and 131632 transitions. [2021-06-05 07:13:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:03,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:03,292 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:03,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 07:13:03,492 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:03,492 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 130 times [2021-06-05 07:13:03,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:03,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583174433] [2021-06-05 07:13:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:13:03,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:03,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583174433] [2021-06-05 07:13:03,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583174433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:03,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500206846] [2021-06-05 07:13:03,522 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 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 07:13:03,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:13:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:03,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:03,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:13:03,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500206846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:03,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:03,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:13:03,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450029918] [2021-06-05 07:13:03,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:13:03,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:13:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:13:03,601 INFO L87 Difference]: Start difference. First operand 34272 states and 131632 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 07:13:04,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:04,176 INFO L93 Difference]: Finished difference Result 41443 states and 155515 transitions. [2021-06-05 07:13:04,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:13:04,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-06-05 07:13:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:04,271 INFO L225 Difference]: With dead ends: 41443 [2021-06-05 07:13:04,271 INFO L226 Difference]: Without dead ends: 41419 [2021-06-05 07:13:04,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:13:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41419 states. [2021-06-05 07:13:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41419 to 34444. [2021-06-05 07:13:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34444 states, 34443 states have (on average 3.8372383358011786) internal successors, (132166), 34443 states have internal predecessors, (132166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34444 states to 34444 states and 132166 transitions. [2021-06-05 07:13:05,372 INFO L78 Accepts]: Start accepts. Automaton has 34444 states and 132166 transitions. Word has length 28 [2021-06-05 07:13:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:05,372 INFO L482 AbstractCegarLoop]: Abstraction has 34444 states and 132166 transitions. [2021-06-05 07:13:05,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 07:13:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 34444 states and 132166 transitions. [2021-06-05 07:13:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:05,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:05,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:13:05,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 07:13:05,625 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 131 times [2021-06-05 07:13:05,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:05,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555517359] [2021-06-05 07:13:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:05,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555517359] [2021-06-05 07:13:05,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555517359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:05,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499071088] [2021-06-05 07:13:05,661 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 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 07:13:05,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:13:05,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:13:05,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:05,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499071088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:05,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:05,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 07:13:05,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415425128] [2021-06-05 07:13:05,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:13:05,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:05,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:13:05,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:13:05,731 INFO L87 Difference]: Start difference. First operand 34444 states and 132166 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 07:13:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:06,339 INFO L93 Difference]: Finished difference Result 37076 states and 140866 transitions. [2021-06-05 07:13:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:13:06,339 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-05 07:13:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:06,423 INFO L225 Difference]: With dead ends: 37076 [2021-06-05 07:13:06,423 INFO L226 Difference]: Without dead ends: 37076 [2021-06-05 07:13:06,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:13:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37076 states. [2021-06-05 07:13:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37076 to 34370. [2021-06-05 07:13:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34370 states, 34369 states have (on average 3.8380517326660653) internal successors, (131910), 34369 states have internal predecessors, (131910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34370 states to 34370 states and 131910 transitions. [2021-06-05 07:13:07,097 INFO L78 Accepts]: Start accepts. Automaton has 34370 states and 131910 transitions. Word has length 28 [2021-06-05 07:13:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:07,097 INFO L482 AbstractCegarLoop]: Abstraction has 34370 states and 131910 transitions. [2021-06-05 07:13:07,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 07:13:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 34370 states and 131910 transitions. [2021-06-05 07:13:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:07,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:07,148 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:07,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:07,348 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:07,348 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 132 times [2021-06-05 07:13:07,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:07,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302851583] [2021-06-05 07:13:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:07,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:07,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302851583] [2021-06-05 07:13:07,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302851583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:07,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110517286] [2021-06-05 07:13:07,383 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 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 07:13:07,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:13:07,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:07,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:07,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110517286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:07,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:07,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:13:07,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580079382] [2021-06-05 07:13:07,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:13:07,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:13:07,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:13:07,458 INFO L87 Difference]: Start difference. First operand 34370 states and 131910 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 07:13:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:08,205 INFO L93 Difference]: Finished difference Result 41366 states and 155256 transitions. [2021-06-05 07:13:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:13:08,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 07:13:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:08,295 INFO L225 Difference]: With dead ends: 41366 [2021-06-05 07:13:08,295 INFO L226 Difference]: Without dead ends: 41326 [2021-06-05 07:13:08,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:13:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41326 states. [2021-06-05 07:13:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41326 to 34544. [2021-06-05 07:13:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34544 states, 34543 states have (on average 3.834264539848884) internal successors, (132447), 34543 states have internal predecessors, (132447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34544 states to 34544 states and 132447 transitions. [2021-06-05 07:13:09,216 INFO L78 Accepts]: Start accepts. Automaton has 34544 states and 132447 transitions. Word has length 28 [2021-06-05 07:13:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:09,216 INFO L482 AbstractCegarLoop]: Abstraction has 34544 states and 132447 transitions. [2021-06-05 07:13:09,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 07:13:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 34544 states and 132447 transitions. [2021-06-05 07:13:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:09,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:09,267 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:09,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable471 [2021-06-05 07:13:09,467 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:09,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:09,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 133 times [2021-06-05 07:13:09,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:09,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863323753] [2021-06-05 07:13:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:09,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:09,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863323753] [2021-06-05 07:13:09,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863323753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:09,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345893080] [2021-06-05 07:13:09,497 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 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 07:13:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:09,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:09,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:09,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345893080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:09,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:09,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:13:09,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595009634] [2021-06-05 07:13:09,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:13:09,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:09,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:13:09,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:13:09,608 INFO L87 Difference]: Start difference. First operand 34544 states and 132447 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:13:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:11,046 INFO L93 Difference]: Finished difference Result 76905 states and 284650 transitions. [2021-06-05 07:13:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:13:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 07:13:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:11,238 INFO L225 Difference]: With dead ends: 76905 [2021-06-05 07:13:11,238 INFO L226 Difference]: Without dead ends: 76905 [2021-06-05 07:13:11,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:13:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76905 states. [2021-06-05 07:13:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76905 to 43639. [2021-06-05 07:13:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43639 states, 43638 states have (on average 3.908336770704432) internal successors, (170552), 43638 states have internal predecessors, (170552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43639 states to 43639 states and 170552 transitions. [2021-06-05 07:13:12,674 INFO L78 Accepts]: Start accepts. Automaton has 43639 states and 170552 transitions. Word has length 28 [2021-06-05 07:13:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:12,674 INFO L482 AbstractCegarLoop]: Abstraction has 43639 states and 170552 transitions. [2021-06-05 07:13:12,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:13:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 43639 states and 170552 transitions. [2021-06-05 07:13:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:12,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:12,743 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:12,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:12,944 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:12,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 134 times [2021-06-05 07:13:12,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:12,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595435611] [2021-06-05 07:13:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:12,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:12,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595435611] [2021-06-05 07:13:12,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595435611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887713483] [2021-06-05 07:13:12,976 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 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 07:13:12,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:13:12,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:12,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:13,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887713483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:13,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:13,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:13:13,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600779080] [2021-06-05 07:13:13,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:13:13,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:13,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:13:13,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:13:13,272 INFO L87 Difference]: Start difference. First operand 43639 states and 170552 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:13:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:14,540 INFO L93 Difference]: Finished difference Result 76303 states and 283058 transitions. [2021-06-05 07:13:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:13:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 07:13:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:14,729 INFO L225 Difference]: With dead ends: 76303 [2021-06-05 07:13:14,729 INFO L226 Difference]: Without dead ends: 76303 [2021-06-05 07:13:14,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 595.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:13:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76303 states. [2021-06-05 07:13:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76303 to 43636. [2021-06-05 07:13:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43636 states, 43635 states have (on average 3.908284633894809) internal successors, (170538), 43635 states have internal predecessors, (170538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43636 states to 43636 states and 170538 transitions. [2021-06-05 07:13:16,367 INFO L78 Accepts]: Start accepts. Automaton has 43636 states and 170538 transitions. Word has length 28 [2021-06-05 07:13:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:16,368 INFO L482 AbstractCegarLoop]: Abstraction has 43636 states and 170538 transitions. [2021-06-05 07:13:16,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 07:13:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 43636 states and 170538 transitions. [2021-06-05 07:13:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:16,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:16,431 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:16,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:16,631 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:16,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 135 times [2021-06-05 07:13:16,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:16,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147710765] [2021-06-05 07:13:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:16,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:16,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147710765] [2021-06-05 07:13:16,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147710765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:16,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566058582] [2021-06-05 07:13:16,660 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 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 07:13:16,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:13:16,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:16,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:16,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:16,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566058582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:16,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:16,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:13:16,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865450628] [2021-06-05 07:13:16,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:13:16,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:16,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:13:16,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:13:16,764 INFO L87 Difference]: Start difference. First operand 43636 states and 170538 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:13:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:17,927 INFO L93 Difference]: Finished difference Result 70919 states and 264966 transitions. [2021-06-05 07:13:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:13:17,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 07:13:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:18,104 INFO L225 Difference]: With dead ends: 70919 [2021-06-05 07:13:18,104 INFO L226 Difference]: Without dead ends: 70919 [2021-06-05 07:13:18,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:13:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70919 states. [2021-06-05 07:13:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70919 to 43660. [2021-06-05 07:13:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.9085182894706705) internal successors, (170642), 43659 states have internal predecessors, (170642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170642 transitions. [2021-06-05 07:13:19,764 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170642 transitions. Word has length 28 [2021-06-05 07:13:19,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:19,764 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170642 transitions. [2021-06-05 07:13:19,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:13:19,764 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170642 transitions. [2021-06-05 07:13:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:19,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:19,851 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:20,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 07:13:20,051 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:20,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 136 times [2021-06-05 07:13:20,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:20,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039607509] [2021-06-05 07:13:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:20,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:20,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039607509] [2021-06-05 07:13:20,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039607509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:20,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336695619] [2021-06-05 07:13:20,080 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 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 07:13:20,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:13:20,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:20,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:20,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:20,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336695619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:20,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:20,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:13:20,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931582628] [2021-06-05 07:13:20,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:13:20,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:20,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:13:20,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:13:20,177 INFO L87 Difference]: Start difference. First operand 43660 states and 170642 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:13:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:21,318 INFO L93 Difference]: Finished difference Result 70043 states and 262701 transitions. [2021-06-05 07:13:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:13:21,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 07:13:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:21,481 INFO L225 Difference]: With dead ends: 70043 [2021-06-05 07:13:21,481 INFO L226 Difference]: Without dead ends: 70035 [2021-06-05 07:13:21,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:13:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70035 states. [2021-06-05 07:13:22,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70035 to 43660. [2021-06-05 07:13:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.908380860761813) internal successors, (170636), 43659 states have internal predecessors, (170636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170636 transitions. [2021-06-05 07:13:22,852 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170636 transitions. Word has length 28 [2021-06-05 07:13:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:22,852 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170636 transitions. [2021-06-05 07:13:22,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:13:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170636 transitions. [2021-06-05 07:13:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:22,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:22,922 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:23,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:23,122 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:23,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:23,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 137 times [2021-06-05 07:13:23,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:23,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749259223] [2021-06-05 07:13:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:23,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:23,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749259223] [2021-06-05 07:13:23,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749259223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:23,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171309106] [2021-06-05 07:13:23,154 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 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 07:13:23,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:13:23,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:23,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171309106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:23,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:23,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:13:23,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826397521] [2021-06-05 07:13:23,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:13:23,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:13:23,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:13:23,274 INFO L87 Difference]: Start difference. First operand 43660 states and 170636 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:13:24,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:24,510 INFO L93 Difference]: Finished difference Result 69550 states and 261394 transitions. [2021-06-05 07:13:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:13:24,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:13:24,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:24,685 INFO L225 Difference]: With dead ends: 69550 [2021-06-05 07:13:24,686 INFO L226 Difference]: Without dead ends: 69550 [2021-06-05 07:13:24,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 543.5ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:13:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69550 states. [2021-06-05 07:13:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69550 to 43668. [2021-06-05 07:13:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908443446996588) internal successors, (170670), 43667 states have internal predecessors, (170670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170670 transitions. [2021-06-05 07:13:26,084 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170670 transitions. Word has length 28 [2021-06-05 07:13:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:26,084 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170670 transitions. [2021-06-05 07:13:26,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:13:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170670 transitions. [2021-06-05 07:13:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:26,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:26,147 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:26,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 07:13:26,347 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 138 times [2021-06-05 07:13:26,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:26,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327376954] [2021-06-05 07:13:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:26,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:26,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327376954] [2021-06-05 07:13:26,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327376954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:26,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168062051] [2021-06-05 07:13:26,376 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 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 07:13:26,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:13:26,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:26,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:26,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168062051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:26,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:26,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:13:26,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79455271] [2021-06-05 07:13:26,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:13:26,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:26,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:13:26,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:13:26,482 INFO L87 Difference]: Start difference. First operand 43668 states and 170670 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:13:27,368 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 07:13:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:27,669 INFO L93 Difference]: Finished difference Result 69317 states and 260810 transitions. [2021-06-05 07:13:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:13:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:13:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:27,855 INFO L225 Difference]: With dead ends: 69317 [2021-06-05 07:13:27,855 INFO L226 Difference]: Without dead ends: 69309 [2021-06-05 07:13:27,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:13:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69309 states. [2021-06-05 07:13:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69309 to 43668. [2021-06-05 07:13:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908397645819498) internal successors, (170668), 43667 states have internal predecessors, (170668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170668 transitions. [2021-06-05 07:13:29,425 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170668 transitions. Word has length 28 [2021-06-05 07:13:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:29,425 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170668 transitions. [2021-06-05 07:13:29,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:13:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170668 transitions. [2021-06-05 07:13:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:29,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:29,486 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:29,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 07:13:29,686 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 139 times [2021-06-05 07:13:29,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:29,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679899350] [2021-06-05 07:13:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:29,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:29,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679899350] [2021-06-05 07:13:29,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679899350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:29,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150916445] [2021-06-05 07:13:29,716 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 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 07:13:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:29,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:29,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:29,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150916445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:29,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:29,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:13:29,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515298006] [2021-06-05 07:13:29,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:13:29,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:29,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:13:29,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:13:29,810 INFO L87 Difference]: Start difference. First operand 43668 states and 170668 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:13:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:31,027 INFO L93 Difference]: Finished difference Result 68845 states and 257637 transitions. [2021-06-05 07:13:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:13:31,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 07:13:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:31,187 INFO L225 Difference]: With dead ends: 68845 [2021-06-05 07:13:31,187 INFO L226 Difference]: Without dead ends: 68845 [2021-06-05 07:13:31,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 534.0ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 07:13:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68845 states. [2021-06-05 07:13:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68845 to 46904. [2021-06-05 07:13:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46904 states, 46903 states have (on average 3.911754045583438) internal successors, (183473), 46903 states have internal predecessors, (183473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46904 states to 46904 states and 183473 transitions. [2021-06-05 07:13:32,859 INFO L78 Accepts]: Start accepts. Automaton has 46904 states and 183473 transitions. Word has length 28 [2021-06-05 07:13:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:32,859 INFO L482 AbstractCegarLoop]: Abstraction has 46904 states and 183473 transitions. [2021-06-05 07:13:32,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:13:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 46904 states and 183473 transitions. [2021-06-05 07:13:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:32,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:32,952 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:33,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 07:13:33,153 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 140 times [2021-06-05 07:13:33,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:33,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566995139] [2021-06-05 07:13:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:33,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566995139] [2021-06-05 07:13:33,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566995139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513482382] [2021-06-05 07:13:33,182 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 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 07:13:33,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:13:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:33,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513482382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:33,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:33,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:13:33,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288139209] [2021-06-05 07:13:33,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:13:33,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:33,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:13:33,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:13:33,271 INFO L87 Difference]: Start difference. First operand 46904 states and 183473 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:13:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:34,199 INFO L93 Difference]: Finished difference Result 68346 states and 256324 transitions. [2021-06-05 07:13:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:13:34,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 07:13:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:34,366 INFO L225 Difference]: With dead ends: 68346 [2021-06-05 07:13:34,366 INFO L226 Difference]: Without dead ends: 68338 [2021-06-05 07:13:34,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:13:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68338 states. [2021-06-05 07:13:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68338 to 46598. [2021-06-05 07:13:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46598 states, 46597 states have (on average 3.917119127840848) internal successors, (182526), 46597 states have internal predecessors, (182526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46598 states to 46598 states and 182526 transitions. [2021-06-05 07:13:35,796 INFO L78 Accepts]: Start accepts. Automaton has 46598 states and 182526 transitions. Word has length 28 [2021-06-05 07:13:35,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:35,796 INFO L482 AbstractCegarLoop]: Abstraction has 46598 states and 182526 transitions. [2021-06-05 07:13:35,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:13:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 46598 states and 182526 transitions. [2021-06-05 07:13:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:35,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:35,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:36,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:36,061 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:36,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 141 times [2021-06-05 07:13:36,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:36,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652777112] [2021-06-05 07:13:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:36,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:36,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652777112] [2021-06-05 07:13:36,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652777112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:36,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92119534] [2021-06-05 07:13:36,091 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 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 07:13:36,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:13:36,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:36,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:36,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92119534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:36,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:36,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:13:36,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426710539] [2021-06-05 07:13:36,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:13:36,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:13:36,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:13:36,187 INFO L87 Difference]: Start difference. First operand 46598 states and 182526 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:13:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:37,200 INFO L93 Difference]: Finished difference Result 66749 states and 251892 transitions. [2021-06-05 07:13:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:13:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 07:13:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:37,386 INFO L225 Difference]: With dead ends: 66749 [2021-06-05 07:13:37,386 INFO L226 Difference]: Without dead ends: 66725 [2021-06-05 07:13:37,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:13:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66725 states. [2021-06-05 07:13:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66725 to 46494. [2021-06-05 07:13:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46494 states, 46493 states have (on average 3.9171058008732498) internal successors, (182118), 46493 states have internal predecessors, (182118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46494 states to 46494 states and 182118 transitions. [2021-06-05 07:13:38,886 INFO L78 Accepts]: Start accepts. Automaton has 46494 states and 182118 transitions. Word has length 28 [2021-06-05 07:13:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:38,887 INFO L482 AbstractCegarLoop]: Abstraction has 46494 states and 182118 transitions. [2021-06-05 07:13:38,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 07:13:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 46494 states and 182118 transitions. [2021-06-05 07:13:38,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:38,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:38,952 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:39,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:39,153 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 142 times [2021-06-05 07:13:39,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:39,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797845389] [2021-06-05 07:13:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:13:39,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:39,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797845389] [2021-06-05 07:13:39,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797845389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:39,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283155976] [2021-06-05 07:13:39,183 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 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 07:13:39,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:13:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:39,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:39,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283155976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:39,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:39,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:13:39,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788818329] [2021-06-05 07:13:39,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:13:39,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:39,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:13:39,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:13:39,497 INFO L87 Difference]: Start difference. First operand 46494 states and 182118 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:13:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:40,553 INFO L93 Difference]: Finished difference Result 67947 states and 255225 transitions. [2021-06-05 07:13:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 07:13:40,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:13:40,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:40,716 INFO L225 Difference]: With dead ends: 67947 [2021-06-05 07:13:40,716 INFO L226 Difference]: Without dead ends: 67947 [2021-06-05 07:13:40,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 729.4ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:13:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67947 states. [2021-06-05 07:13:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67947 to 46590. [2021-06-05 07:13:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46590 states, 46589 states have (on average 3.9157741097684005) internal successors, (182432), 46589 states have internal predecessors, (182432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46590 states to 46590 states and 182432 transitions. [2021-06-05 07:13:42,167 INFO L78 Accepts]: Start accepts. Automaton has 46590 states and 182432 transitions. Word has length 28 [2021-06-05 07:13:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:42,167 INFO L482 AbstractCegarLoop]: Abstraction has 46590 states and 182432 transitions. [2021-06-05 07:13:42,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:13:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 46590 states and 182432 transitions. [2021-06-05 07:13:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:42,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:42,243 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:42,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:42,443 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:42,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 143 times [2021-06-05 07:13:42,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:42,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686780465] [2021-06-05 07:13:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:13:42,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:42,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686780465] [2021-06-05 07:13:42,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686780465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:42,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290127364] [2021-06-05 07:13:42,476 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 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 07:13:42,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:13:42,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:42,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:42,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:42,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290127364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:42,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:42,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:13:42,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872095723] [2021-06-05 07:13:42,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:13:42,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:42,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:13:42,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:13:42,591 INFO L87 Difference]: Start difference. First operand 46590 states and 182432 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:13:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:43,843 INFO L93 Difference]: Finished difference Result 67507 states and 253969 transitions. [2021-06-05 07:13:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:13:43,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-05 07:13:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:44,023 INFO L225 Difference]: With dead ends: 67507 [2021-06-05 07:13:44,023 INFO L226 Difference]: Without dead ends: 67499 [2021-06-05 07:13:44,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:13:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67499 states. [2021-06-05 07:13:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67499 to 46522. [2021-06-05 07:13:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46522 states, 46521 states have (on average 3.916940736441607) internal successors, (182220), 46521 states have internal predecessors, (182220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46522 states to 46522 states and 182220 transitions. [2021-06-05 07:13:45,314 INFO L78 Accepts]: Start accepts. Automaton has 46522 states and 182220 transitions. Word has length 28 [2021-06-05 07:13:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:45,314 INFO L482 AbstractCegarLoop]: Abstraction has 46522 states and 182220 transitions. [2021-06-05 07:13:45,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 07:13:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 46522 states and 182220 transitions. [2021-06-05 07:13:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:45,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:45,380 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:45,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:45,580 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:45,580 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 144 times [2021-06-05 07:13:45,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:45,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010946708] [2021-06-05 07:13:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:13:45,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:45,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010946708] [2021-06-05 07:13:45,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010946708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:45,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130563851] [2021-06-05 07:13:45,610 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 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 07:13:45,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:13:45,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:45,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:45,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130563851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:45,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:45,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:13:45,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302451019] [2021-06-05 07:13:45,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:13:45,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:13:45,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:13:45,706 INFO L87 Difference]: Start difference. First operand 46522 states and 182220 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:13:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:46,729 INFO L93 Difference]: Finished difference Result 66238 states and 250458 transitions. [2021-06-05 07:13:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:13:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 07:13:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:46,898 INFO L225 Difference]: With dead ends: 66238 [2021-06-05 07:13:46,899 INFO L226 Difference]: Without dead ends: 66214 [2021-06-05 07:13:46,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:13:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66214 states. [2021-06-05 07:13:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66214 to 46498. [2021-06-05 07:13:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46498 states, 46497 states have (on average 3.9170699184893647) internal successors, (182132), 46497 states have internal predecessors, (182132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46498 states to 46498 states and 182132 transitions. [2021-06-05 07:13:48,366 INFO L78 Accepts]: Start accepts. Automaton has 46498 states and 182132 transitions. Word has length 28 [2021-06-05 07:13:48,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:48,366 INFO L482 AbstractCegarLoop]: Abstraction has 46498 states and 182132 transitions. [2021-06-05 07:13:48,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 07:13:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 46498 states and 182132 transitions. [2021-06-05 07:13:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:48,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:48,437 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:48,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-06-05 07:13:48,637 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:48,638 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 145 times [2021-06-05 07:13:48,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:48,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935465796] [2021-06-05 07:13:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:48,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:48,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935465796] [2021-06-05 07:13:48,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935465796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:48,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197316541] [2021-06-05 07:13:48,672 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 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 07:13:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:48,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:48,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:48,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197316541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:48,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:48,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:13:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100114927] [2021-06-05 07:13:48,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:13:48,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:48,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:13:48,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:13:48,759 INFO L87 Difference]: Start difference. First operand 46498 states and 182132 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:13:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:50,324 INFO L93 Difference]: Finished difference Result 69780 states and 260558 transitions. [2021-06-05 07:13:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 07:13:50,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-05 07:13:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:50,499 INFO L225 Difference]: With dead ends: 69780 [2021-06-05 07:13:50,499 INFO L226 Difference]: Without dead ends: 69780 [2021-06-05 07:13:50,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 946.6ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 07:13:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69780 states. [2021-06-05 07:13:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69780 to 51268. [2021-06-05 07:13:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51268 states, 51267 states have (on average 3.8675756334484173) internal successors, (198279), 51267 states have internal predecessors, (198279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51268 states to 51268 states and 198279 transitions. [2021-06-05 07:13:52,087 INFO L78 Accepts]: Start accepts. Automaton has 51268 states and 198279 transitions. Word has length 28 [2021-06-05 07:13:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:52,087 INFO L482 AbstractCegarLoop]: Abstraction has 51268 states and 198279 transitions. [2021-06-05 07:13:52,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:13:52,087 INFO L276 IsEmpty]: Start isEmpty. Operand 51268 states and 198279 transitions. [2021-06-05 07:13:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:52,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:52,160 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:52,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:13:52,365 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:52,365 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 146 times [2021-06-05 07:13:52,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:52,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782259710] [2021-06-05 07:13:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:52,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:52,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782259710] [2021-06-05 07:13:52,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782259710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:52,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423932722] [2021-06-05 07:13:52,399 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 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 07:13:52,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:13:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:52,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:52,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423932722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:52,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:52,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:13:52,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927131654] [2021-06-05 07:13:52,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:13:52,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:52,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:13:52,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:13:52,499 INFO L87 Difference]: Start difference. First operand 51268 states and 198279 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:13:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:53,885 INFO L93 Difference]: Finished difference Result 68981 states and 258379 transitions. [2021-06-05 07:13:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:13:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-05 07:13:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:54,066 INFO L225 Difference]: With dead ends: 68981 [2021-06-05 07:13:54,066 INFO L226 Difference]: Without dead ends: 68973 [2021-06-05 07:13:54,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 587.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 07:13:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68973 states. [2021-06-05 07:13:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68973 to 50106. [2021-06-05 07:13:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50106 states, 50105 states have (on average 3.885001496856601) internal successors, (194658), 50105 states have internal predecessors, (194658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50106 states to 50106 states and 194658 transitions. [2021-06-05 07:13:55,545 INFO L78 Accepts]: Start accepts. Automaton has 50106 states and 194658 transitions. Word has length 28 [2021-06-05 07:13:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:55,545 INFO L482 AbstractCegarLoop]: Abstraction has 50106 states and 194658 transitions. [2021-06-05 07:13:55,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:13:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 50106 states and 194658 transitions. [2021-06-05 07:13:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:55,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:55,615 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:55,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 07:13:55,815 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:55,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 147 times [2021-06-05 07:13:55,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:55,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481675613] [2021-06-05 07:13:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:55,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:55,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481675613] [2021-06-05 07:13:55,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481675613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:55,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113895088] [2021-06-05 07:13:55,849 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 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 07:13:55,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:13:55,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:55,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:55,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113895088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:55,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:55,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:13:55,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314108307] [2021-06-05 07:13:55,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:13:55,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:13:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:13:55,932 INFO L87 Difference]: Start difference. First operand 50106 states and 194658 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:13:56,734 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 07:13:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:13:57,209 INFO L93 Difference]: Finished difference Result 67179 states and 253388 transitions. [2021-06-05 07:13:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:13:57,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-05 07:13:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:13:57,384 INFO L225 Difference]: With dead ends: 67179 [2021-06-05 07:13:57,384 INFO L226 Difference]: Without dead ends: 67155 [2021-06-05 07:13:57,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 758.2ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:13:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67155 states. [2021-06-05 07:13:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67155 to 50086. [2021-06-05 07:13:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.883278426674653) internal successors, (194494), 50085 states have internal predecessors, (194494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:13:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194494 transitions. [2021-06-05 07:13:58,853 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194494 transitions. Word has length 28 [2021-06-05 07:13:58,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:13:58,853 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194494 transitions. [2021-06-05 07:13:58,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:13:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194494 transitions. [2021-06-05 07:13:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:13:58,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:13:58,924 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:13:59,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 07:13:59,124 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:13:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:13:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 148 times [2021-06-05 07:13:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:13:59,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316754521] [2021-06-05 07:13:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:13:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:13:59,378 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 07:13:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:59,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:13:59,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316754521] [2021-06-05 07:13:59,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316754521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:59,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802238139] [2021-06-05 07:13:59,426 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 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 07:13:59,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:13:59,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:13:59,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:13:59,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:13:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:13:59,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802238139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:13:59,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:13:59,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:13:59,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542248732] [2021-06-05 07:13:59,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:13:59,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:13:59,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:13:59,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:13:59,517 INFO L87 Difference]: Start difference. First operand 50086 states and 194494 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:14:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:00,569 INFO L93 Difference]: Finished difference Result 68547 states and 257187 transitions. [2021-06-05 07:14:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:14:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-05 07:14:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:00,737 INFO L225 Difference]: With dead ends: 68547 [2021-06-05 07:14:00,737 INFO L226 Difference]: Without dead ends: 68507 [2021-06-05 07:14:00,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:14:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68507 states. [2021-06-05 07:14:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68507 to 50240. [2021-06-05 07:14:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50240 states, 50239 states have (on average 3.882621071279285) internal successors, (195059), 50239 states have internal predecessors, (195059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50240 states to 50240 states and 195059 transitions. [2021-06-05 07:14:02,344 INFO L78 Accepts]: Start accepts. Automaton has 50240 states and 195059 transitions. Word has length 28 [2021-06-05 07:14:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:02,344 INFO L482 AbstractCegarLoop]: Abstraction has 50240 states and 195059 transitions. [2021-06-05 07:14:02,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:14:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50240 states and 195059 transitions. [2021-06-05 07:14:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:02,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:02,413 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:02,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 07:14:02,625 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:02,625 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 149 times [2021-06-05 07:14:02,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:02,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543296492] [2021-06-05 07:14:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:02,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:02,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543296492] [2021-06-05 07:14:02,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543296492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:02,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868063123] [2021-06-05 07:14:02,672 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 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 07:14:02,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:14:02,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:02,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:02,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:02,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868063123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:02,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:02,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:14:02,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077567993] [2021-06-05 07:14:02,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:14:02,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:02,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:14:02,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:14:02,786 INFO L87 Difference]: Start difference. First operand 50240 states and 195059 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 07:14:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:04,366 INFO L93 Difference]: Finished difference Result 67665 states and 254567 transitions. [2021-06-05 07:14:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 07:14:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-05 07:14:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:04,528 INFO L225 Difference]: With dead ends: 67665 [2021-06-05 07:14:04,528 INFO L226 Difference]: Without dead ends: 67665 [2021-06-05 07:14:04,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 07:14:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67665 states. [2021-06-05 07:14:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67665 to 51145. [2021-06-05 07:14:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51145 states, 51144 states have (on average 3.8739637103081495) internal successors, (198130), 51144 states have internal predecessors, (198130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51145 states to 51145 states and 198130 transitions. [2021-06-05 07:14:05,917 INFO L78 Accepts]: Start accepts. Automaton has 51145 states and 198130 transitions. Word has length 28 [2021-06-05 07:14:05,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:05,917 INFO L482 AbstractCegarLoop]: Abstraction has 51145 states and 198130 transitions. [2021-06-05 07:14:05,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 07:14:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 51145 states and 198130 transitions. [2021-06-05 07:14:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:05,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:05,989 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:06,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 07:14:06,189 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 150 times [2021-06-05 07:14:06,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:06,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798377446] [2021-06-05 07:14:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:06,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:06,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798377446] [2021-06-05 07:14:06,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798377446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:06,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50857472] [2021-06-05 07:14:06,232 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 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 07:14:06,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:14:06,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:06,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:06,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50857472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:06,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:06,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:14:06,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315569389] [2021-06-05 07:14:06,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:14:06,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:14:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:14:06,341 INFO L87 Difference]: Start difference. First operand 51145 states and 198130 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 07:14:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:07,762 INFO L93 Difference]: Finished difference Result 67040 states and 252804 transitions. [2021-06-05 07:14:07,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:14:07,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-05 07:14:07,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:07,929 INFO L225 Difference]: With dead ends: 67040 [2021-06-05 07:14:07,929 INFO L226 Difference]: Without dead ends: 67032 [2021-06-05 07:14:07,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 603.4ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:14:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67032 states. [2021-06-05 07:14:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67032 to 51069. [2021-06-05 07:14:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51069 states, 51068 states have (on average 3.875107699537871) internal successors, (197894), 51068 states have internal predecessors, (197894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51069 states to 51069 states and 197894 transitions. [2021-06-05 07:14:09,346 INFO L78 Accepts]: Start accepts. Automaton has 51069 states and 197894 transitions. Word has length 28 [2021-06-05 07:14:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:09,346 INFO L482 AbstractCegarLoop]: Abstraction has 51069 states and 197894 transitions. [2021-06-05 07:14:09,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 07:14:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 51069 states and 197894 transitions. [2021-06-05 07:14:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:09,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:09,418 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:09,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 07:14:09,618 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:09,618 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 151 times [2021-06-05 07:14:09,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:09,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151666853] [2021-06-05 07:14:09,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:09,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:09,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151666853] [2021-06-05 07:14:09,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151666853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:09,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903259169] [2021-06-05 07:14:09,653 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 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 07:14:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:09,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:09,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:09,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903259169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:09,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:09,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:14:09,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946347016] [2021-06-05 07:14:09,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:14:09,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:14:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:14:09,750 INFO L87 Difference]: Start difference. First operand 51069 states and 197894 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:10,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:10,973 INFO L93 Difference]: Finished difference Result 66517 states and 251558 transitions. [2021-06-05 07:14:10,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:14:10,974 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 07:14:10,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:11,135 INFO L225 Difference]: With dead ends: 66517 [2021-06-05 07:14:11,135 INFO L226 Difference]: Without dead ends: 66493 [2021-06-05 07:14:11,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:14:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66493 states. [2021-06-05 07:14:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66493 to 51055. [2021-06-05 07:14:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51055 states, 51054 states have (on average 3.8750930387432914) internal successors, (197839), 51054 states have internal predecessors, (197839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51055 states to 51055 states and 197839 transitions. [2021-06-05 07:14:12,596 INFO L78 Accepts]: Start accepts. Automaton has 51055 states and 197839 transitions. Word has length 28 [2021-06-05 07:14:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:12,596 INFO L482 AbstractCegarLoop]: Abstraction has 51055 states and 197839 transitions. [2021-06-05 07:14:12,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 51055 states and 197839 transitions. [2021-06-05 07:14:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:12,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:12,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:12,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:12,867 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:12,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 152 times [2021-06-05 07:14:12,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:12,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503309844] [2021-06-05 07:14:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:12,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:12,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503309844] [2021-06-05 07:14:12,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503309844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:12,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416239375] [2021-06-05 07:14:12,902 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 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 07:14:12,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:14:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:13,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416239375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:13,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:13,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:14:13,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101173762] [2021-06-05 07:14:13,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:14:13,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:13,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:14:13,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:14:13,227 INFO L87 Difference]: Start difference. First operand 51055 states and 197839 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 07:14:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:14,202 INFO L93 Difference]: Finished difference Result 66299 states and 250865 transitions. [2021-06-05 07:14:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:14:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-06-05 07:14:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:14,365 INFO L225 Difference]: With dead ends: 66299 [2021-06-05 07:14:14,365 INFO L226 Difference]: Without dead ends: 66259 [2021-06-05 07:14:14,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:14:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66259 states. [2021-06-05 07:14:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66259 to 51404. [2021-06-05 07:14:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51404 states, 51403 states have (on average 3.87658307880863) internal successors, (199268), 51403 states have internal predecessors, (199268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51404 states to 51404 states and 199268 transitions. [2021-06-05 07:14:16,002 INFO L78 Accepts]: Start accepts. Automaton has 51404 states and 199268 transitions. Word has length 28 [2021-06-05 07:14:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:16,002 INFO L482 AbstractCegarLoop]: Abstraction has 51404 states and 199268 transitions. [2021-06-05 07:14:16,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 07:14:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 51404 states and 199268 transitions. [2021-06-05 07:14:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:16,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:16,076 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:16,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:16,277 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 153 times [2021-06-05 07:14:16,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:16,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831280611] [2021-06-05 07:14:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:16,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:16,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831280611] [2021-06-05 07:14:16,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831280611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:16,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334371121] [2021-06-05 07:14:16,320 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 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 07:14:16,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:14:16,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:16,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:16,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334371121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:16,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:16,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:14:16,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020381383] [2021-06-05 07:14:16,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:14:16,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:14:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:14:16,447 INFO L87 Difference]: Start difference. First operand 51404 states and 199268 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 07:14:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:17,608 INFO L93 Difference]: Finished difference Result 80562 states and 301306 transitions. [2021-06-05 07:14:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:14:17,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-06-05 07:14:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:17,811 INFO L225 Difference]: With dead ends: 80562 [2021-06-05 07:14:17,811 INFO L226 Difference]: Without dead ends: 80562 [2021-06-05 07:14:17,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 553.2ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:14:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80562 states. [2021-06-05 07:14:19,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80562 to 52570. [2021-06-05 07:14:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52570 states, 52569 states have (on average 3.888660617474177) internal successors, (204423), 52569 states have internal predecessors, (204423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52570 states to 52570 states and 204423 transitions. [2021-06-05 07:14:19,517 INFO L78 Accepts]: Start accepts. Automaton has 52570 states and 204423 transitions. Word has length 28 [2021-06-05 07:14:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:19,517 INFO L482 AbstractCegarLoop]: Abstraction has 52570 states and 204423 transitions. [2021-06-05 07:14:19,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 07:14:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 52570 states and 204423 transitions. [2021-06-05 07:14:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:19,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:19,594 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:19,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:19,795 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:19,795 INFO L82 PathProgramCache]: Analyzing trace with hash 132028309, now seen corresponding path program 154 times [2021-06-05 07:14:19,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:19,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429058765] [2021-06-05 07:14:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:19,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:19,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429058765] [2021-06-05 07:14:19,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429058765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:19,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593279563] [2021-06-05 07:14:19,829 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 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 07:14:19,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:14:19,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:19,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:19,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:19,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593279563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:19,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:19,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:14:19,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806402521] [2021-06-05 07:14:19,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:14:19,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:14:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:14:19,931 INFO L87 Difference]: Start difference. First operand 52570 states and 204423 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:21,248 INFO L93 Difference]: Finished difference Result 73577 states and 279250 transitions. [2021-06-05 07:14:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:14:21,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 07:14:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:21,442 INFO L225 Difference]: With dead ends: 73577 [2021-06-05 07:14:21,442 INFO L226 Difference]: Without dead ends: 73577 [2021-06-05 07:14:21,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 485.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:14:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73577 states. [2021-06-05 07:14:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73577 to 52600. [2021-06-05 07:14:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52600 states, 52599 states have (on average 3.888476967242723) internal successors, (204530), 52599 states have internal predecessors, (204530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52600 states to 52600 states and 204530 transitions. [2021-06-05 07:14:22,928 INFO L78 Accepts]: Start accepts. Automaton has 52600 states and 204530 transitions. Word has length 28 [2021-06-05 07:14:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:22,928 INFO L482 AbstractCegarLoop]: Abstraction has 52600 states and 204530 transitions. [2021-06-05 07:14:22,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 52600 states and 204530 transitions. [2021-06-05 07:14:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:23,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:23,002 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:23,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:23,202 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1785388485, now seen corresponding path program 155 times [2021-06-05 07:14:23,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:23,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121535816] [2021-06-05 07:14:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:23,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121535816] [2021-06-05 07:14:23,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121535816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573960330] [2021-06-05 07:14:23,236 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 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 07:14:23,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:14:23,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:23,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:23,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573960330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:23,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:23,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:14:23,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290428202] [2021-06-05 07:14:23,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:14:23,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:23,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:14:23,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:14:23,355 INFO L87 Difference]: Start difference. First operand 52600 states and 204530 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 07:14:24,382 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 07:14:25,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:25,102 INFO L93 Difference]: Finished difference Result 74613 states and 282201 transitions. [2021-06-05 07:14:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:14:25,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-05 07:14:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:25,297 INFO L225 Difference]: With dead ends: 74613 [2021-06-05 07:14:25,298 INFO L226 Difference]: Without dead ends: 74613 [2021-06-05 07:14:25,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:14:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74613 states. [2021-06-05 07:14:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74613 to 52864. [2021-06-05 07:14:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52864 states, 52863 states have (on average 3.8852883869625257) internal successors, (205388), 52863 states have internal predecessors, (205388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52864 states to 52864 states and 205388 transitions. [2021-06-05 07:14:27,149 INFO L78 Accepts]: Start accepts. Automaton has 52864 states and 205388 transitions. Word has length 28 [2021-06-05 07:14:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:27,150 INFO L482 AbstractCegarLoop]: Abstraction has 52864 states and 205388 transitions. [2021-06-05 07:14:27,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 07:14:27,150 INFO L276 IsEmpty]: Start isEmpty. Operand 52864 states and 205388 transitions. [2021-06-05 07:14:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:27,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:27,241 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:27,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:27,442 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash -866539657, now seen corresponding path program 156 times [2021-06-05 07:14:27,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:27,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369348195] [2021-06-05 07:14:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:27,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:27,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369348195] [2021-06-05 07:14:27,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369348195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:27,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940632971] [2021-06-05 07:14:27,483 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 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 07:14:27,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:14:27,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:27,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:27,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:27,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940632971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:27,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:27,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:14:27,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804618694] [2021-06-05 07:14:27,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:14:27,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:27,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:14:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:14:27,592 INFO L87 Difference]: Start difference. First operand 52864 states and 205388 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 07:14:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:28,797 INFO L93 Difference]: Finished difference Result 73622 states and 279382 transitions. [2021-06-05 07:14:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:14:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-05 07:14:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:28,982 INFO L225 Difference]: With dead ends: 73622 [2021-06-05 07:14:28,982 INFO L226 Difference]: Without dead ends: 73618 [2021-06-05 07:14:28,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 638.7ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 07:14:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73618 states. [2021-06-05 07:14:30,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73618 to 52500. [2021-06-05 07:14:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52500 states, 52499 states have (on average 3.8886835939732185) internal successors, (204152), 52499 states have internal predecessors, (204152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52500 states to 52500 states and 204152 transitions. [2021-06-05 07:14:30,774 INFO L78 Accepts]: Start accepts. Automaton has 52500 states and 204152 transitions. Word has length 28 [2021-06-05 07:14:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:30,774 INFO L482 AbstractCegarLoop]: Abstraction has 52500 states and 204152 transitions. [2021-06-05 07:14:30,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 07:14:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 52500 states and 204152 transitions. [2021-06-05 07:14:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:30,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:30,851 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:31,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-06-05 07:14:31,051 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:31,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1338899459, now seen corresponding path program 157 times [2021-06-05 07:14:31,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:31,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099141752] [2021-06-05 07:14:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:31,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:31,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099141752] [2021-06-05 07:14:31,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099141752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:31,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825165735] [2021-06-05 07:14:31,086 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 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 07:14:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:31,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:31,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825165735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:31,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:31,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:14:31,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051965083] [2021-06-05 07:14:31,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:14:31,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:31,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:14:31,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:14:31,187 INFO L87 Difference]: Start difference. First operand 52500 states and 204152 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:32,030 INFO L93 Difference]: Finished difference Result 67618 states and 258391 transitions. [2021-06-05 07:14:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:14:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 07:14:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:32,200 INFO L225 Difference]: With dead ends: 67618 [2021-06-05 07:14:32,200 INFO L226 Difference]: Without dead ends: 67618 [2021-06-05 07:14:32,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:14:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67618 states. [2021-06-05 07:14:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67618 to 52516. [2021-06-05 07:14:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52516 states, 52515 states have (on average 3.8903170522707797) internal successors, (204300), 52515 states have internal predecessors, (204300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52516 states to 52516 states and 204300 transitions. [2021-06-05 07:14:33,791 INFO L78 Accepts]: Start accepts. Automaton has 52516 states and 204300 transitions. Word has length 28 [2021-06-05 07:14:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:33,791 INFO L482 AbstractCegarLoop]: Abstraction has 52516 states and 204300 transitions. [2021-06-05 07:14:33,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 52516 states and 204300 transitions. [2021-06-05 07:14:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:33,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:33,866 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:34,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 07:14:34,067 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:34,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1775748157, now seen corresponding path program 158 times [2021-06-05 07:14:34,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:34,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578003629] [2021-06-05 07:14:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:34,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578003629] [2021-06-05 07:14:34,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578003629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809370630] [2021-06-05 07:14:34,103 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 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 07:14:34,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:14:34,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:34,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809370630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:34,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:34,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:14:34,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967435534] [2021-06-05 07:14:34,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:14:34,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:34,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:14:34,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:14:34,201 INFO L87 Difference]: Start difference. First operand 52516 states and 204300 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:34,927 INFO L93 Difference]: Finished difference Result 66808 states and 256162 transitions. [2021-06-05 07:14:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:14:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 07:14:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:35,092 INFO L225 Difference]: With dead ends: 66808 [2021-06-05 07:14:35,092 INFO L226 Difference]: Without dead ends: 66796 [2021-06-05 07:14:35,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:14:35,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66796 states. [2021-06-05 07:14:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66796 to 52450. [2021-06-05 07:14:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52450 states, 52449 states have (on average 3.8913420656256554) internal successors, (204097), 52449 states have internal predecessors, (204097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52450 states to 52450 states and 204097 transitions. [2021-06-05 07:14:36,735 INFO L78 Accepts]: Start accepts. Automaton has 52450 states and 204097 transitions. Word has length 28 [2021-06-05 07:14:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:36,735 INFO L482 AbstractCegarLoop]: Abstraction has 52450 states and 204097 transitions. [2021-06-05 07:14:36,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 52450 states and 204097 transitions. [2021-06-05 07:14:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:36,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:36,810 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:37,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 07:14:37,010 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash 517999999, now seen corresponding path program 159 times [2021-06-05 07:14:37,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:37,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085189110] [2021-06-05 07:14:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:37,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:37,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085189110] [2021-06-05 07:14:37,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085189110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:37,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111349654] [2021-06-05 07:14:37,047 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 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 07:14:37,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:14:37,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:37,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:37,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111349654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:37,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:37,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:14:37,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113669585] [2021-06-05 07:14:37,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:14:37,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:14:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:14:37,152 INFO L87 Difference]: Start difference. First operand 52450 states and 204097 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:37,777 INFO L93 Difference]: Finished difference Result 57072 states and 219303 transitions. [2021-06-05 07:14:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:14:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 07:14:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:37,918 INFO L225 Difference]: With dead ends: 57072 [2021-06-05 07:14:37,918 INFO L226 Difference]: Without dead ends: 57072 [2021-06-05 07:14:37,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:14:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57072 states. [2021-06-05 07:14:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57072 to 52658. [2021-06-05 07:14:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52658 states, 52657 states have (on average 3.8891125586341797) internal successors, (204789), 52657 states have internal predecessors, (204789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52658 states to 52658 states and 204789 transitions. [2021-06-05 07:14:39,473 INFO L78 Accepts]: Start accepts. Automaton has 52658 states and 204789 transitions. Word has length 28 [2021-06-05 07:14:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:39,473 INFO L482 AbstractCegarLoop]: Abstraction has 52658 states and 204789 transitions. [2021-06-05 07:14:39,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 07:14:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 52658 states and 204789 transitions. [2021-06-05 07:14:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:39,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:39,549 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 07:14:39,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:39,750 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:39,750 INFO L82 PathProgramCache]: Analyzing trace with hash -480567967, now seen corresponding path program 160 times [2021-06-05 07:14:39,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:39,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570909589] [2021-06-05 07:14:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:39,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:39,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570909589] [2021-06-05 07:14:39,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570909589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:39,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025623794] [2021-06-05 07:14:39,781 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 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 07:14:39,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:14:39,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:39,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025623794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:39,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:39,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:14:39,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539242232] [2021-06-05 07:14:39,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:14:39,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:39,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:14:39,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:14:39,876 INFO L87 Difference]: Start difference. First operand 52658 states and 204789 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:14:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:40,420 INFO L93 Difference]: Finished difference Result 56883 states and 218795 transitions. [2021-06-05 07:14:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:14:40,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 07:14:40,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:40,560 INFO L225 Difference]: With dead ends: 56883 [2021-06-05 07:14:40,560 INFO L226 Difference]: Without dead ends: 56879 [2021-06-05 07:14:40,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:14:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56879 states. [2021-06-05 07:14:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56879 to 52598. [2021-06-05 07:14:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52598 states, 52597 states have (on average 3.889898663421868) internal successors, (204597), 52597 states have internal predecessors, (204597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52598 states to 52598 states and 204597 transitions. [2021-06-05 07:14:41,844 INFO L78 Accepts]: Start accepts. Automaton has 52598 states and 204597 transitions. Word has length 28 [2021-06-05 07:14:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:41,844 INFO L482 AbstractCegarLoop]: Abstraction has 52598 states and 204597 transitions. [2021-06-05 07:14:41,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 07:14:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 52598 states and 204597 transitions. [2021-06-05 07:14:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:41,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:41,917 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:14:42,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 07:14:42,117 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:42,118 INFO L82 PathProgramCache]: Analyzing trace with hash -510371023, now seen corresponding path program 87 times [2021-06-05 07:14:42,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:42,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526843241] [2021-06-05 07:14:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:42,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:42,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526843241] [2021-06-05 07:14:42,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526843241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:42,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175990867] [2021-06-05 07:14:42,152 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 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 07:14:42,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:14:42,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:42,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:42,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:42,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175990867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:42,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:42,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:14:42,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341846954] [2021-06-05 07:14:42,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:14:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:14:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:14:42,223 INFO L87 Difference]: Start difference. First operand 52598 states and 204597 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 07:14:42,519 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 07:14:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:42,989 INFO L93 Difference]: Finished difference Result 56952 states and 218997 transitions. [2021-06-05 07:14:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:14:42,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-05 07:14:42,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:43,129 INFO L225 Difference]: With dead ends: 56952 [2021-06-05 07:14:43,129 INFO L226 Difference]: Without dead ends: 56952 [2021-06-05 07:14:43,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:14:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56952 states. [2021-06-05 07:14:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56952 to 52718. [2021-06-05 07:14:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52718 states, 52717 states have (on average 3.8880247358537092) internal successors, (204965), 52717 states have internal predecessors, (204965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52718 states to 52718 states and 204965 transitions. [2021-06-05 07:14:44,369 INFO L78 Accepts]: Start accepts. Automaton has 52718 states and 204965 transitions. Word has length 28 [2021-06-05 07:14:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:44,369 INFO L482 AbstractCegarLoop]: Abstraction has 52718 states and 204965 transitions. [2021-06-05 07:14:44,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 07:14:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 52718 states and 204965 transitions. [2021-06-05 07:14:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:44,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:44,447 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:14:44,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:44,649 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash 394977929, now seen corresponding path program 88 times [2021-06-05 07:14:44,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:44,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204707487] [2021-06-05 07:14:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:14:44,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:44,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204707487] [2021-06-05 07:14:44,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204707487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:44,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630115823] [2021-06-05 07:14:44,678 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 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 07:14:44,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:14:44,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:44,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:44,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:14:44,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630115823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:44,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:44,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 07:14:44,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622863180] [2021-06-05 07:14:44,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:14:44,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:44,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:14:44,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:14:44,741 INFO L87 Difference]: Start difference. First operand 52718 states and 204965 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 07:14:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:45,468 INFO L93 Difference]: Finished difference Result 57132 states and 219636 transitions. [2021-06-05 07:14:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:14:45,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 28 [2021-06-05 07:14:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:45,618 INFO L225 Difference]: With dead ends: 57132 [2021-06-05 07:14:45,618 INFO L226 Difference]: Without dead ends: 57120 [2021-06-05 07:14:45,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:14:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57120 states. [2021-06-05 07:14:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57120 to 52852. [2021-06-05 07:14:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.8863976083707024) internal successors, (205400), 52851 states have internal predecessors, (205400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205400 transitions. [2021-06-05 07:14:46,901 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205400 transitions. Word has length 28 [2021-06-05 07:14:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:46,901 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205400 transitions. [2021-06-05 07:14:46,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 07:14:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205400 transitions. [2021-06-05 07:14:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:46,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:46,979 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:14:47,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 07:14:47,179 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:47,179 INFO L82 PathProgramCache]: Analyzing trace with hash -597515635, now seen corresponding path program 89 times [2021-06-05 07:14:47,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:47,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357653770] [2021-06-05 07:14:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:47,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:47,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357653770] [2021-06-05 07:14:47,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357653770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:47,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029350358] [2021-06-05 07:14:47,214 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 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 07:14:47,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:14:47,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:14:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:47,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029350358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:47,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:47,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:14:47,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154587729] [2021-06-05 07:14:47,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:14:47,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:47,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:14:47,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:14:47,279 INFO L87 Difference]: Start difference. First operand 52852 states and 205400 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 07:14:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:47,744 INFO L93 Difference]: Finished difference Result 57096 states and 219552 transitions. [2021-06-05 07:14:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:14:47,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-05 07:14:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:47,892 INFO L225 Difference]: With dead ends: 57096 [2021-06-05 07:14:47,892 INFO L226 Difference]: Without dead ends: 57076 [2021-06-05 07:14:47,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:14:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57076 states. [2021-06-05 07:14:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57076 to 52852. [2021-06-05 07:14:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.886321923899264) internal successors, (205396), 52851 states have internal predecessors, (205396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205396 transitions. [2021-06-05 07:14:49,256 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205396 transitions. Word has length 28 [2021-06-05 07:14:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:49,256 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205396 transitions. [2021-06-05 07:14:49,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 07:14:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205396 transitions. [2021-06-05 07:14:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:49,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:49,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:14:49,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 07:14:49,793 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 970045237, now seen corresponding path program 161 times [2021-06-05 07:14:49,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:49,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055519429] [2021-06-05 07:14:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:49,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:49,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055519429] [2021-06-05 07:14:49,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055519429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:49,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338933148] [2021-06-05 07:14:49,825 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 07:14:49,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:14:49,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:49,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:14:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:49,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338933148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:49,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:49,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:14:49,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067142485] [2021-06-05 07:14:49,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:14:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:14:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:14:49,902 INFO L87 Difference]: Start difference. First operand 52852 states and 205396 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:14:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:50,402 INFO L93 Difference]: Finished difference Result 57813 states and 222961 transitions. [2021-06-05 07:14:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:14:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:14:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:50,557 INFO L225 Difference]: With dead ends: 57813 [2021-06-05 07:14:50,557 INFO L226 Difference]: Without dead ends: 57800 [2021-06-05 07:14:50,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:14:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57800 states. [2021-06-05 07:14:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57800 to 55585. [2021-06-05 07:14:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 3.8929188255613125) internal successors, (216384), 55584 states have internal predecessors, (216384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 216384 transitions. [2021-06-05 07:14:51,858 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 216384 transitions. Word has length 28 [2021-06-05 07:14:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:51,858 INFO L482 AbstractCegarLoop]: Abstraction has 55585 states and 216384 transitions. [2021-06-05 07:14:51,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:14:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 216384 transitions. [2021-06-05 07:14:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:51,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:51,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:14:52,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 07:14:52,152 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash 287300907, now seen corresponding path program 162 times [2021-06-05 07:14:52,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:52,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271898362] [2021-06-05 07:14:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:52,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:52,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271898362] [2021-06-05 07:14:52,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271898362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:52,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992640804] [2021-06-05 07:14:52,184 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 07:14:52,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:14:52,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:52,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:14:52,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:52,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992640804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:52,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:52,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:14:52,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105385096] [2021-06-05 07:14:52,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:14:52,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:52,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:14:52,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:14:52,263 INFO L87 Difference]: Start difference. First operand 55585 states and 216384 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:14:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:52,978 INFO L93 Difference]: Finished difference Result 61541 states and 235789 transitions. [2021-06-05 07:14:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:14:52,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:14:52,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:53,141 INFO L225 Difference]: With dead ends: 61541 [2021-06-05 07:14:53,141 INFO L226 Difference]: Without dead ends: 61541 [2021-06-05 07:14:53,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:14:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61541 states. [2021-06-05 07:14:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61541 to 49164. [2021-06-05 07:14:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49164 states, 49163 states have (on average 3.882350548176474) internal successors, (190868), 49163 states have internal predecessors, (190868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49164 states to 49164 states and 190868 transitions. [2021-06-05 07:14:54,383 INFO L78 Accepts]: Start accepts. Automaton has 49164 states and 190868 transitions. Word has length 28 [2021-06-05 07:14:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:54,383 INFO L482 AbstractCegarLoop]: Abstraction has 49164 states and 190868 transitions. [2021-06-05 07:14:54,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:14:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 49164 states and 190868 transitions. [2021-06-05 07:14:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:54,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:54,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:14:54,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-05 07:14:54,657 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash -32817557, now seen corresponding path program 163 times [2021-06-05 07:14:54,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:54,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160356191] [2021-06-05 07:14:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:54,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:54,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160356191] [2021-06-05 07:14:54,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160356191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:54,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584429160] [2021-06-05 07:14:54,689 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 07:14:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:14:54,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:54,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584429160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:54,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:54,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:14:54,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529587103] [2021-06-05 07:14:54,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:14:54,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:54,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:14:54,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:14:54,769 INFO L87 Difference]: Start difference. First operand 49164 states and 190868 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:14:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:55,274 INFO L93 Difference]: Finished difference Result 54122 states and 207592 transitions. [2021-06-05 07:14:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:14:55,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:14:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:55,413 INFO L225 Difference]: With dead ends: 54122 [2021-06-05 07:14:55,413 INFO L226 Difference]: Without dead ends: 54122 [2021-06-05 07:14:55,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:14:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54122 states. [2021-06-05 07:14:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54122 to 49997. [2021-06-05 07:14:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49997 states, 49996 states have (on average 3.880830466437315) internal successors, (194026), 49996 states have internal predecessors, (194026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49997 states to 49997 states and 194026 transitions. [2021-06-05 07:14:56,694 INFO L78 Accepts]: Start accepts. Automaton has 49997 states and 194026 transitions. Word has length 28 [2021-06-05 07:14:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:56,694 INFO L482 AbstractCegarLoop]: Abstraction has 49997 states and 194026 transitions. [2021-06-05 07:14:56,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:14:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 49997 states and 194026 transitions. [2021-06-05 07:14:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:57,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:57,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:14:57,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:57,237 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:57,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1041987733, now seen corresponding path program 164 times [2021-06-05 07:14:57,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:57,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974295492] [2021-06-05 07:14:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:57,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:57,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974295492] [2021-06-05 07:14:57,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974295492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:57,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759522497] [2021-06-05 07:14:57,277 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 07:14:57,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:14:57,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:57,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:14:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:57,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759522497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:57,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:57,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:14:57,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362973990] [2021-06-05 07:14:57,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:14:57,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:57,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:14:57,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:14:57,355 INFO L87 Difference]: Start difference. First operand 49997 states and 194026 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:14:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:57,826 INFO L93 Difference]: Finished difference Result 51830 states and 200167 transitions. [2021-06-05 07:14:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:14:57,827 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:14:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:14:57,957 INFO L225 Difference]: With dead ends: 51830 [2021-06-05 07:14:57,957 INFO L226 Difference]: Without dead ends: 51830 [2021-06-05 07:14:57,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:14:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51830 states. [2021-06-05 07:14:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51830 to 50005. [2021-06-05 07:14:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50005 states, 50004 states have (on average 3.880689544836413) internal successors, (194050), 50004 states have internal predecessors, (194050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:14:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50005 states to 50005 states and 194050 transitions. [2021-06-05 07:14:59,104 INFO L78 Accepts]: Start accepts. Automaton has 50005 states and 194050 transitions. Word has length 28 [2021-06-05 07:14:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:14:59,104 INFO L482 AbstractCegarLoop]: Abstraction has 50005 states and 194050 transitions. [2021-06-05 07:14:59,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 07:14:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 50005 states and 194050 transitions. [2021-06-05 07:14:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:14:59,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:14:59,177 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:14:59,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:14:59,379 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:14:59,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:14:59,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1139256197, now seen corresponding path program 165 times [2021-06-05 07:14:59,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:14:59,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272696864] [2021-06-05 07:14:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:14:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:14:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:59,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:14:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272696864] [2021-06-05 07:14:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272696864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637107566] [2021-06-05 07:14:59,414 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 07:14:59,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:14:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:14:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:14:59,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:14:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:14:59,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637107566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:14:59,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:14:59,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:14:59,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278426562] [2021-06-05 07:14:59,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:14:59,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:14:59,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:14:59,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:14:59,497 INFO L87 Difference]: Start difference. First operand 50005 states and 194050 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:14:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:14:59,954 INFO L93 Difference]: Finished difference Result 51550 states and 199245 transitions. [2021-06-05 07:14:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:14:59,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 28 [2021-06-05 07:14:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:00,087 INFO L225 Difference]: With dead ends: 51550 [2021-06-05 07:15:00,315 INFO L226 Difference]: Without dead ends: 51550 [2021-06-05 07:15:00,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:15:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51550 states. [2021-06-05 07:15:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51550 to 49899. [2021-06-05 07:15:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49899 states, 49898 states have (on average 3.8804360896228305) internal successors, (193626), 49898 states have internal predecessors, (193626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49899 states to 49899 states and 193626 transitions. [2021-06-05 07:15:01,563 INFO L78 Accepts]: Start accepts. Automaton has 49899 states and 193626 transitions. Word has length 28 [2021-06-05 07:15:01,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:01,563 INFO L482 AbstractCegarLoop]: Abstraction has 49899 states and 193626 transitions. [2021-06-05 07:15:01,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 07:15:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 49899 states and 193626 transitions. [2021-06-05 07:15:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:01,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:01,642 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:01,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:01,843 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash -993746325, now seen corresponding path program 166 times [2021-06-05 07:15:01,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:01,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470848749] [2021-06-05 07:15:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:02,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:02,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470848749] [2021-06-05 07:15:02,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470848749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:02,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477791187] [2021-06-05 07:15:02,057 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 07:15:02,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:02,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:02,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:15:02,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:02,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:02,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:02,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:02,317 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:15:02,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:02,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:02,323 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 07:15:02,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 07:15:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:02,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477791187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:02,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:02,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:15:02,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236454385] [2021-06-05 07:15:02,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:15:02,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:15:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:15:02,337 INFO L87 Difference]: Start difference. First operand 49899 states and 193626 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 07:15:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:03,532 INFO L93 Difference]: Finished difference Result 53034 states and 202923 transitions. [2021-06-05 07:15:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:15:03,533 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 07:15:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:03,682 INFO L225 Difference]: With dead ends: 53034 [2021-06-05 07:15:03,682 INFO L226 Difference]: Without dead ends: 53004 [2021-06-05 07:15:03,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 795.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:15:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53004 states. [2021-06-05 07:15:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53004 to 49956. [2021-06-05 07:15:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49956 states, 49955 states have (on average 3.8796717045340805) internal successors, (193809), 49955 states have internal predecessors, (193809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49956 states to 49956 states and 193809 transitions. [2021-06-05 07:15:04,845 INFO L78 Accepts]: Start accepts. Automaton has 49956 states and 193809 transitions. Word has length 30 [2021-06-05 07:15:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:04,846 INFO L482 AbstractCegarLoop]: Abstraction has 49956 states and 193809 transitions. [2021-06-05 07:15:04,846 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 07:15:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 49956 states and 193809 transitions. [2021-06-05 07:15:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:05,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:05,128 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:05,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:05,343 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1272822955, now seen corresponding path program 167 times [2021-06-05 07:15:05,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:05,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384059456] [2021-06-05 07:15:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:05,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:05,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384059456] [2021-06-05 07:15:05,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384059456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:05,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357191670] [2021-06-05 07:15:05,572 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 07:15:05,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:15:05,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:05,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:15:05,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:05,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:05,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:05,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:05,887 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:15:05,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:05,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:05,893 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 07:15:05,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-06-05 07:15:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:05,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357191670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:05,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:05,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:15:05,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063398360] [2021-06-05 07:15:05,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:15:05,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:05,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:15:05,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:15:05,917 INFO L87 Difference]: Start difference. First operand 49956 states and 193809 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 07:15:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:07,506 INFO L93 Difference]: Finished difference Result 53044 states and 202956 transitions. [2021-06-05 07:15:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:15:07,506 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 07:15:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:07,648 INFO L225 Difference]: With dead ends: 53044 [2021-06-05 07:15:07,648 INFO L226 Difference]: Without dead ends: 53029 [2021-06-05 07:15:07,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1108.5ms TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:15:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53029 states. [2021-06-05 07:15:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53029 to 49948. [2021-06-05 07:15:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49948 states, 49947 states have (on average 3.8798726650249264) internal successors, (193788), 49947 states have internal predecessors, (193788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49948 states to 49948 states and 193788 transitions. [2021-06-05 07:15:08,781 INFO L78 Accepts]: Start accepts. Automaton has 49948 states and 193788 transitions. Word has length 30 [2021-06-05 07:15:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:08,782 INFO L482 AbstractCegarLoop]: Abstraction has 49948 states and 193788 transitions. [2021-06-05 07:15:08,782 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 07:15:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 49948 states and 193788 transitions. [2021-06-05 07:15:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:09,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:09,021 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:09,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:09,223 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:09,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:09,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1430715033, now seen corresponding path program 168 times [2021-06-05 07:15:09,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:09,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196488256] [2021-06-05 07:15:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:09,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:09,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196488256] [2021-06-05 07:15:09,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196488256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:09,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638488525] [2021-06-05 07:15:09,417 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 07:15:09,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:15:09,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:09,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:15:09,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:09,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:09,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:09,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:09,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 07:15:09,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:09,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:09,660 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 07:15:09,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 07:15:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:09,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638488525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:09,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:09,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:15:09,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120572276] [2021-06-05 07:15:09,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:15:09,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:15:09,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:15:09,675 INFO L87 Difference]: Start difference. First operand 49948 states and 193788 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 07:15:11,016 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 07:15:12,220 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 07:15:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:13,165 INFO L93 Difference]: Finished difference Result 63314 states and 238515 transitions. [2021-06-05 07:15:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:15:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:15:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:13,321 INFO L225 Difference]: With dead ends: 63314 [2021-06-05 07:15:13,321 INFO L226 Difference]: Without dead ends: 63299 [2021-06-05 07:15:13,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2805.9ms TimeCoverageRelationStatistics Valid=514, Invalid=3026, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:15:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63299 states. [2021-06-05 07:15:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63299 to 50006. [2021-06-05 07:15:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50006 states, 50005 states have (on average 3.8794120587941205) internal successors, (193990), 50005 states have internal predecessors, (193990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50006 states to 50006 states and 193990 transitions. [2021-06-05 07:15:14,527 INFO L78 Accepts]: Start accepts. Automaton has 50006 states and 193990 transitions. Word has length 30 [2021-06-05 07:15:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:14,527 INFO L482 AbstractCegarLoop]: Abstraction has 50006 states and 193990 transitions. [2021-06-05 07:15:14,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:15:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 50006 states and 193990 transitions. [2021-06-05 07:15:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:14,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:14,604 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:14,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 07:15:14,809 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:14,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:14,809 INFO L82 PathProgramCache]: Analyzing trace with hash -625667857, now seen corresponding path program 169 times [2021-06-05 07:15:14,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:14,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739077667] [2021-06-05 07:15:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:15,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:15,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739077667] [2021-06-05 07:15:15,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739077667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:15,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789218757] [2021-06-05 07:15:15,033 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 07:15:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:15,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:15:15,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:15,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:15,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:15,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:15,270 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:15:15,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:15,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:15,275 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 07:15:15,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 07:15:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:15,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789218757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:15,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:15,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:15:15,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861837801] [2021-06-05 07:15:15,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:15:15,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:15,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:15:15,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:15:15,291 INFO L87 Difference]: Start difference. First operand 50006 states and 193990 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) 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 07:15:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:16,944 INFO L93 Difference]: Finished difference Result 55413 states and 210324 transitions. [2021-06-05 07:15:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:15:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:15:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:17,078 INFO L225 Difference]: With dead ends: 55413 [2021-06-05 07:15:17,078 INFO L226 Difference]: Without dead ends: 55398 [2021-06-05 07:15:17,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 981.7ms TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:15:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55398 states. [2021-06-05 07:15:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55398 to 50051. [2021-06-05 07:15:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50051 states, 50050 states have (on average 3.878981018981019) internal successors, (194143), 50050 states have internal predecessors, (194143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50051 states to 50051 states and 194143 transitions. [2021-06-05 07:15:18,255 INFO L78 Accepts]: Start accepts. Automaton has 50051 states and 194143 transitions. Word has length 30 [2021-06-05 07:15:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:18,255 INFO L482 AbstractCegarLoop]: Abstraction has 50051 states and 194143 transitions. [2021-06-05 07:15:18,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:15:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 50051 states and 194143 transitions. [2021-06-05 07:15:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:18,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:18,330 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:18,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 07:15:18,530 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:18,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1938529707, now seen corresponding path program 170 times [2021-06-05 07:15:18,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:18,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748506651] [2021-06-05 07:15:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:18,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:18,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748506651] [2021-06-05 07:15:18,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748506651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:18,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062142763] [2021-06-05 07:15:18,755 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 07:15:18,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:15:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:18,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:15:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:19,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:19,012 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 07:15:19,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:15:19,087 INFO L628 ElimStorePlain]: treesize reduction 87, result has 40.0 percent of original size [2021-06-05 07:15:19,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 07:15:19,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:84 [2021-06-05 07:15:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:19,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062142763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:19,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:19,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 07:15:19,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696040649] [2021-06-05 07:15:19,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:15:19,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:19,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:15:19,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:15:19,179 INFO L87 Difference]: Start difference. First operand 50051 states and 194143 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 07:15:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:21,695 INFO L93 Difference]: Finished difference Result 53236 states and 203549 transitions. [2021-06-05 07:15:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:15:21,696 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:15:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:21,825 INFO L225 Difference]: With dead ends: 53236 [2021-06-05 07:15:21,825 INFO L226 Difference]: Without dead ends: 53221 [2021-06-05 07:15:21,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1913.0ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:15:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53221 states. [2021-06-05 07:15:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53221 to 50057. [2021-06-05 07:15:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50057 states, 50056 states have (on average 3.8790155026370465) internal successors, (194168), 50056 states have internal predecessors, (194168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50057 states to 50057 states and 194168 transitions. [2021-06-05 07:15:22,967 INFO L78 Accepts]: Start accepts. Automaton has 50057 states and 194168 transitions. Word has length 30 [2021-06-05 07:15:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:22,967 INFO L482 AbstractCegarLoop]: Abstraction has 50057 states and 194168 transitions. [2021-06-05 07:15:22,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:15:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 50057 states and 194168 transitions. [2021-06-05 07:15:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:23,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:23,053 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:23,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:23,254 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash -806056025, now seen corresponding path program 171 times [2021-06-05 07:15:23,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:23,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656913715] [2021-06-05 07:15:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:23,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656913715] [2021-06-05 07:15:23,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656913715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:23,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727162581] [2021-06-05 07:15:23,639 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 07:15:23,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:15:23,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:23,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:15:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:23,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:24,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:24,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 59 [2021-06-05 07:15:24,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:15:24,130 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-06-05 07:15:24,130 INFO L628 ElimStorePlain]: treesize reduction 169, result has 26.5 percent of original size [2021-06-05 07:15:24,140 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 07:15:24,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:87 [2021-06-05 07:15:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:24,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727162581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:24,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:24,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-06-05 07:15:24,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535781792] [2021-06-05 07:15:24,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:15:24,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:24,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:15:24,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:15:24,237 INFO L87 Difference]: Start difference. First operand 50057 states and 194168 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 07:15:25,337 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-06-05 07:15:26,147 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2021-06-05 07:15:26,707 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-05 07:15:26,940 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-06-05 07:15:27,155 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-06-05 07:15:27,392 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-06-05 07:15:27,801 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-06-05 07:15:28,297 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-05 07:15:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:29,230 INFO L93 Difference]: Finished difference Result 71077 states and 266109 transitions. [2021-06-05 07:15:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 07:15:29,230 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 07:15:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:29,398 INFO L225 Difference]: With dead ends: 71077 [2021-06-05 07:15:29,398 INFO L226 Difference]: Without dead ends: 71047 [2021-06-05 07:15:29,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 4204.7ms TimeCoverageRelationStatistics Valid=725, Invalid=5281, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 07:15:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71047 states. [2021-06-05 07:15:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71047 to 50086. [2021-06-05 07:15:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.8791055206149547) internal successors, (194285), 50085 states have internal predecessors, (194285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194285 transitions. [2021-06-05 07:15:30,806 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194285 transitions. Word has length 30 [2021-06-05 07:15:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:30,806 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194285 transitions. [2021-06-05 07:15:30,807 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 07:15:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194285 transitions. [2021-06-05 07:15:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:30,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:30,885 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:31,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 07:15:31,086 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1782374869, now seen corresponding path program 172 times [2021-06-05 07:15:31,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:31,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579189630] [2021-06-05 07:15:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:31,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:31,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579189630] [2021-06-05 07:15:31,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579189630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:31,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712637031] [2021-06-05 07:15:31,236 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 07:15:31,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:15:31,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:31,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:15:31,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:31,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:31,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:31,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:15:31,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:31,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:31,554 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 07:15:31,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 07:15:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:31,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712637031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:31,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:31,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:15:31,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091186913] [2021-06-05 07:15:31,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:15:31,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:15:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:15:31,573 INFO L87 Difference]: Start difference. First operand 50086 states and 194285 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 07:15:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:35,379 INFO L93 Difference]: Finished difference Result 84102 states and 311805 transitions. [2021-06-05 07:15:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:15:35,379 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 07:15:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:35,586 INFO L225 Difference]: With dead ends: 84102 [2021-06-05 07:15:35,586 INFO L226 Difference]: Without dead ends: 84072 [2021-06-05 07:15:35,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2730.4ms TimeCoverageRelationStatistics Valid=535, Invalid=4435, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 07:15:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84072 states. [2021-06-05 07:15:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84072 to 50147. [2021-06-05 07:15:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50147 states, 50146 states have (on average 3.8789534559087464) internal successors, (194514), 50146 states have internal predecessors, (194514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50147 states to 50147 states and 194514 transitions. [2021-06-05 07:15:37,021 INFO L78 Accepts]: Start accepts. Automaton has 50147 states and 194514 transitions. Word has length 30 [2021-06-05 07:15:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:37,021 INFO L482 AbstractCegarLoop]: Abstraction has 50147 states and 194514 transitions. [2021-06-05 07:15:37,021 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 07:15:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 50147 states and 194514 transitions. [2021-06-05 07:15:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:37,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:37,322 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:37,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:37,533 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:37,533 INFO L82 PathProgramCache]: Analyzing trace with hash -688283281, now seen corresponding path program 173 times [2021-06-05 07:15:37,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:37,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593714966] [2021-06-05 07:15:37,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:37,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:37,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593714966] [2021-06-05 07:15:37,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593714966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:37,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851597690] [2021-06-05 07:15:37,680 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 07:15:37,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:15:37,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:37,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:15:37,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:37,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:37,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:37,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:37,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:37,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:37,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:37,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 07:15:37,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:37,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:37,935 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 07:15:37,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 07:15:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:37,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851597690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:37,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:37,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:15:37,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511933260] [2021-06-05 07:15:37,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:15:37,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:37,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:15:37,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:15:37,954 INFO L87 Difference]: Start difference. First operand 50147 states and 194514 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 07:15:40,504 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 07:15:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:40,831 INFO L93 Difference]: Finished difference Result 83268 states and 309473 transitions. [2021-06-05 07:15:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:15:40,831 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 07:15:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:41,031 INFO L225 Difference]: With dead ends: 83268 [2021-06-05 07:15:41,031 INFO L226 Difference]: Without dead ends: 83253 [2021-06-05 07:15:41,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1993.2ms TimeCoverageRelationStatistics Valid=413, Invalid=3493, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:15:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83253 states. [2021-06-05 07:15:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83253 to 50159. [2021-06-05 07:15:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50159 states, 50158 states have (on average 3.8786634235814823) internal successors, (194546), 50158 states have internal predecessors, (194546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50159 states to 50159 states and 194546 transitions. [2021-06-05 07:15:42,433 INFO L78 Accepts]: Start accepts. Automaton has 50159 states and 194546 transitions. Word has length 30 [2021-06-05 07:15:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:42,433 INFO L482 AbstractCegarLoop]: Abstraction has 50159 states and 194546 transitions. [2021-06-05 07:15:42,433 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 07:15:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 50159 states and 194546 transitions. [2021-06-05 07:15:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:42,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:42,507 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:42,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:15:42,707 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:42,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1460513255, now seen corresponding path program 174 times [2021-06-05 07:15:42,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:42,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430421052] [2021-06-05 07:15:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:42,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:42,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430421052] [2021-06-05 07:15:42,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430421052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:42,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320731783] [2021-06-05 07:15:42,850 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 07:15:42,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:15:42,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:15:42,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:43,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:43,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:43,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 07:15:43,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:43,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:43,115 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 07:15:43,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 07:15:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:43,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320731783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:43,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:43,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:15:43,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768665426] [2021-06-05 07:15:43,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:15:43,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:15:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:15:43,134 INFO L87 Difference]: Start difference. First operand 50159 states and 194546 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 07:15:43,886 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 07:15:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:47,000 INFO L93 Difference]: Finished difference Result 94075 states and 345871 transitions. [2021-06-05 07:15:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 07:15:47,001 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 07:15:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:47,227 INFO L225 Difference]: With dead ends: 94075 [2021-06-05 07:15:47,227 INFO L226 Difference]: Without dead ends: 94045 [2021-06-05 07:15:47,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 2684.8ms TimeCoverageRelationStatistics Valid=621, Invalid=4781, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 07:15:47,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94045 states. [2021-06-05 07:15:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94045 to 50168. [2021-06-05 07:15:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50168 states, 50167 states have (on average 3.8787449917276295) internal successors, (194585), 50167 states have internal predecessors, (194585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50168 states to 50168 states and 194585 transitions. [2021-06-05 07:15:48,705 INFO L78 Accepts]: Start accepts. Automaton has 50168 states and 194585 transitions. Word has length 30 [2021-06-05 07:15:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:48,705 INFO L482 AbstractCegarLoop]: Abstraction has 50168 states and 194585 transitions. [2021-06-05 07:15:48,705 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 07:15:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 50168 states and 194585 transitions. [2021-06-05 07:15:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:48,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:48,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:48,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 07:15:48,980 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash -450848413, now seen corresponding path program 90 times [2021-06-05 07:15:48,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:48,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550965010] [2021-06-05 07:15:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:49,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:49,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550965010] [2021-06-05 07:15:49,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550965010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:49,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318831117] [2021-06-05 07:15:49,295 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 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 07:15:49,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:15:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:15:49,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:15:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:49,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:49,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:49,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:49,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:49,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:49,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:49,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 07:15:49,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:49,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:49,534 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 07:15:49,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-06-05 07:15:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:49,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318831117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:49,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:49,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:15:49,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457232281] [2021-06-05 07:15:49,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:15:49,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:49,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:15:49,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:15:49,550 INFO L87 Difference]: Start difference. First operand 50168 states and 194585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 07:15:51,812 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-05 07:15:53,351 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 07:15:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:53,890 INFO L93 Difference]: Finished difference Result 63519 states and 239225 transitions. [2021-06-05 07:15:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:15:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 07:15:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:54,050 INFO L225 Difference]: With dead ends: 63519 [2021-06-05 07:15:54,050 INFO L226 Difference]: Without dead ends: 63504 [2021-06-05 07:15:54,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 3525.2ms TimeCoverageRelationStatistics Valid=569, Invalid=3591, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:15:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63504 states. [2021-06-05 07:15:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63504 to 50203. [2021-06-05 07:15:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50203 states, 50202 states have (on average 3.8777538743476354) internal successors, (194671), 50202 states have internal predecessors, (194671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:15:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50203 states to 50203 states and 194671 transitions. [2021-06-05 07:15:55,235 INFO L78 Accepts]: Start accepts. Automaton has 50203 states and 194671 transitions. Word has length 30 [2021-06-05 07:15:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:15:55,236 INFO L482 AbstractCegarLoop]: Abstraction has 50203 states and 194671 transitions. [2021-06-05 07:15:55,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 07:15:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 50203 states and 194671 transitions. [2021-06-05 07:15:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:15:55,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:15:55,313 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:15:55,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 07:15:55,513 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:15:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:15:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 878036001, now seen corresponding path program 175 times [2021-06-05 07:15:55,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:15:55,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823041153] [2021-06-05 07:15:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:15:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:55,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:15:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823041153] [2021-06-05 07:15:55,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823041153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560857568] [2021-06-05 07:15:55,655 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 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 07:15:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:15:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:15:55,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:15:56,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:56,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:56,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:56,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:56,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:15:56,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:15:56,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:15:56,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:15:56,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:15:56,013 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 07:15:56,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 07:15:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:15:56,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560857568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:15:56,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:15:56,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:15:56,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115109244] [2021-06-05 07:15:56,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:15:56,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:15:56,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:15:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:15:56,032 INFO L87 Difference]: Start difference. First operand 50203 states and 194671 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 07:15:57,260 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-06-05 07:15:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:15:59,601 INFO L93 Difference]: Finished difference Result 83399 states and 309818 transitions. [2021-06-05 07:15:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:15:59,602 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 07:15:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:15:59,802 INFO L225 Difference]: With dead ends: 83399 [2021-06-05 07:15:59,802 INFO L226 Difference]: Without dead ends: 83384 [2021-06-05 07:15:59,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2466.0ms TimeCoverageRelationStatistics Valid=468, Invalid=4088, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:16:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83384 states. [2021-06-05 07:16:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83384 to 50245. [2021-06-05 07:16:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-06-05 07:16:01,273 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-06-05 07:16:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:01,274 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-06-05 07:16:01,274 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 07:16:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-06-05 07:16:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:01,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:01,348 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:01,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 07:16:01,548 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:01,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2084417043, now seen corresponding path program 176 times [2021-06-05 07:16:01,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:01,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632122558] [2021-06-05 07:16:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:01,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:01,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632122558] [2021-06-05 07:16:01,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632122558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:01,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072844771] [2021-06-05 07:16:01,745 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 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 07:16:01,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:16:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:01,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:16:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:01,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:01,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:01,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:01,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 07:16:01,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:01,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:01,960 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 07:16:01,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 07:16:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:01,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072844771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:01,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:01,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 07:16:01,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196127116] [2021-06-05 07:16:01,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:16:01,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:01,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:16:01,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:16:01,976 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) 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 07:16:03,488 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 07:16:05,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:05,313 INFO L93 Difference]: Finished difference Result 71516 states and 267553 transitions. [2021-06-05 07:16:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:16:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) 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 07:16:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:05,489 INFO L225 Difference]: With dead ends: 71516 [2021-06-05 07:16:05,489 INFO L226 Difference]: Without dead ends: 71501 [2021-06-05 07:16:05,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2581.5ms TimeCoverageRelationStatistics Valid=535, Invalid=3497, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:16:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71501 states. [2021-06-05 07:16:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71501 to 50245. [2021-06-05 07:16:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-06-05 07:16:06,768 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-06-05 07:16:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:06,769 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-06-05 07:16:06,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) 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 07:16:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-06-05 07:16:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:07,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:07,086 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:07,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 07:16:07,286 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1108098199, now seen corresponding path program 177 times [2021-06-05 07:16:07,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:07,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353127384] [2021-06-05 07:16:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:07,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:07,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353127384] [2021-06-05 07:16:07,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353127384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:07,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352494166] [2021-06-05 07:16:07,432 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 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 07:16:07,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:16:07,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:07,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:16:07,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:07,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:07,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:07,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85 [2021-06-05 07:16:07,989 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:16:08,146 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-06-05 07:16:08,146 INFO L628 ElimStorePlain]: treesize reduction 62, result has 77.0 percent of original size [2021-06-05 07:16:08,465 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 184 [2021-06-05 07:16:08,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:16:08,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:2120 [2021-06-05 07:16:09,055 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 54 [2021-06-05 07:16:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:09,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352494166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:09,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:09,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 07:16:09,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302089721] [2021-06-05 07:16:09,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:16:09,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:09,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:16:09,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:16:09,212 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) 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 07:16:10,345 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 07:16:14,226 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 07:16:14,403 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 07:16:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:14,826 INFO L93 Difference]: Finished difference Result 84175 states and 312104 transitions. [2021-06-05 07:16:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:16:14,826 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) 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 07:16:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:15,022 INFO L225 Difference]: With dead ends: 84175 [2021-06-05 07:16:15,022 INFO L226 Difference]: Without dead ends: 84145 [2021-06-05 07:16:15,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 4167.2ms TimeCoverageRelationStatistics Valid=599, Invalid=6043, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 07:16:15,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84145 states. [2021-06-05 07:16:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84145 to 50231. [2021-06-05 07:16:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50231 states, 50230 states have (on average 3.8775233923949832) internal successors, (194768), 50230 states have internal predecessors, (194768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50231 states to 50231 states and 194768 transitions. [2021-06-05 07:16:16,363 INFO L78 Accepts]: Start accepts. Automaton has 50231 states and 194768 transitions. Word has length 30 [2021-06-05 07:16:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:16,363 INFO L482 AbstractCegarLoop]: Abstraction has 50231 states and 194768 transitions. [2021-06-05 07:16:16,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) 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 07:16:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 50231 states and 194768 transitions. [2021-06-05 07:16:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:16,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:16,439 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:16,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-05 07:16:16,640 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1339274201, now seen corresponding path program 178 times [2021-06-05 07:16:16,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:16,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448311476] [2021-06-05 07:16:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:16,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:16,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448311476] [2021-06-05 07:16:16,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448311476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:16,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060748561] [2021-06-05 07:16:16,868 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 07:16:16,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:16:16,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:16,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:16:16,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:17,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:17,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:17,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:17,118 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:16:17,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:17,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:17,123 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 07:16:17,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 07:16:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:17,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060748561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:17,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:17,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:16:17,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374972435] [2021-06-05 07:16:17,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:16:17,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:17,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:16:17,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:16:17,136 INFO L87 Difference]: Start difference. First operand 50231 states and 194768 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 07:16:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:18,743 INFO L93 Difference]: Finished difference Result 73610 states and 278935 transitions. [2021-06-05 07:16:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:16:18,743 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 07:16:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:18,939 INFO L225 Difference]: With dead ends: 73610 [2021-06-05 07:16:18,939 INFO L226 Difference]: Without dead ends: 73580 [2021-06-05 07:16:18,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 931.8ms TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:16:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73580 states. [2021-06-05 07:16:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73580 to 50288. [2021-06-05 07:16:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50288 states, 50287 states have (on average 3.876946328076839) internal successors, (194960), 50287 states have internal predecessors, (194960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50288 states to 50288 states and 194960 transitions. [2021-06-05 07:16:20,343 INFO L78 Accepts]: Start accepts. Automaton has 50288 states and 194960 transitions. Word has length 30 [2021-06-05 07:16:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:20,344 INFO L482 AbstractCegarLoop]: Abstraction has 50288 states and 194960 transitions. [2021-06-05 07:16:20,344 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 07:16:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50288 states and 194960 transitions. [2021-06-05 07:16:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:20,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:20,421 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:20,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 07:16:20,622 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:20,622 INFO L82 PathProgramCache]: Analyzing trace with hash 927295079, now seen corresponding path program 179 times [2021-06-05 07:16:20,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:20,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875224745] [2021-06-05 07:16:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:20,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:20,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875224745] [2021-06-05 07:16:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875224745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:20,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662679502] [2021-06-05 07:16:20,847 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 07:16:20,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:16:20,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:20,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:16:20,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:21,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:21,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:21,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:21,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:16:21,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:21,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:21,129 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 07:16:21,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-06-05 07:16:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:21,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662679502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:21,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:21,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:16:21,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47452292] [2021-06-05 07:16:21,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:16:21,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:21,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:16:21,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:16:21,145 INFO L87 Difference]: Start difference. First operand 50288 states and 194960 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 07:16:21,688 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-06-05 07:16:23,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:23,642 INFO L93 Difference]: Finished difference Result 73555 states and 278809 transitions. [2021-06-05 07:16:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:16:23,642 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 07:16:23,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:23,826 INFO L225 Difference]: With dead ends: 73555 [2021-06-05 07:16:23,826 INFO L226 Difference]: Without dead ends: 73540 [2021-06-05 07:16:23,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1674.4ms TimeCoverageRelationStatistics Valid=440, Invalid=2640, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:16:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73540 states. [2021-06-05 07:16:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73540 to 50280. [2021-06-05 07:16:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50280 states, 50279 states have (on average 3.8771455279540166) internal successors, (194939), 50279 states have internal predecessors, (194939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50280 states to 50280 states and 194939 transitions. [2021-06-05 07:16:25,415 INFO L78 Accepts]: Start accepts. Automaton has 50280 states and 194939 transitions. Word has length 30 [2021-06-05 07:16:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:25,415 INFO L482 AbstractCegarLoop]: Abstraction has 50280 states and 194939 transitions. [2021-06-05 07:16:25,415 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 07:16:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 50280 states and 194939 transitions. [2021-06-05 07:16:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:25,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:25,494 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:25,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:25,695 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash -971195733, now seen corresponding path program 180 times [2021-06-05 07:16:25,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:25,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922786035] [2021-06-05 07:16:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:25,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:25,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922786035] [2021-06-05 07:16:25,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922786035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:25,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973784764] [2021-06-05 07:16:25,931 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 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 07:16:25,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:16:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:16:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:26,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:26,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:26,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:26,160 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:16:26,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:26,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:26,167 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 07:16:26,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 07:16:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:26,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973784764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:26,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:26,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:16:26,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015823003] [2021-06-05 07:16:26,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:16:26,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:26,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:16:26,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:16:26,185 INFO L87 Difference]: Start difference. First operand 50280 states and 194939 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) 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 07:16:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:28,076 INFO L93 Difference]: Finished difference Result 76864 states and 288901 transitions. [2021-06-05 07:16:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:16:28,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:16:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:28,303 INFO L225 Difference]: With dead ends: 76864 [2021-06-05 07:16:28,303 INFO L226 Difference]: Without dead ends: 76849 [2021-06-05 07:16:28,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1192.9ms TimeCoverageRelationStatistics Valid=517, Invalid=2345, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:16:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76849 states. [2021-06-05 07:16:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76849 to 50282. [2021-06-05 07:16:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50282 states, 50281 states have (on average 3.8772498558103456) internal successors, (194952), 50281 states have internal predecessors, (194952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194952 transitions. [2021-06-05 07:16:29,676 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194952 transitions. Word has length 30 [2021-06-05 07:16:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:29,677 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194952 transitions. [2021-06-05 07:16:29,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:16:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194952 transitions. [2021-06-05 07:16:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:29,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:29,749 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:29,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 07:16:29,950 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:29,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:29,950 INFO L82 PathProgramCache]: Analyzing trace with hash -397133013, now seen corresponding path program 181 times [2021-06-05 07:16:29,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:29,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114672244] [2021-06-05 07:16:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:30,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:30,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114672244] [2021-06-05 07:16:30,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114672244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:30,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394992623] [2021-06-05 07:16:30,103 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 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 07:16:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:16:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:30,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:30,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:30,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:30,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:30,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:30,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:30,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:16:30,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:30,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:30,430 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 07:16:30,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 07:16:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:30,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394992623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:30,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:30,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:16:30,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904279701] [2021-06-05 07:16:30,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:16:30,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:30,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:16:30,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:16:30,449 INFO L87 Difference]: Start difference. First operand 50282 states and 194952 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 07:16:31,855 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-05 07:16:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:35,651 INFO L93 Difference]: Finished difference Result 91774 states and 339295 transitions. [2021-06-05 07:16:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:16:35,652 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 07:16:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:35,871 INFO L225 Difference]: With dead ends: 91774 [2021-06-05 07:16:35,872 INFO L226 Difference]: Without dead ends: 91744 [2021-06-05 07:16:35,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 3317.6ms TimeCoverageRelationStatistics Valid=655, Invalid=5665, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 07:16:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91744 states. [2021-06-05 07:16:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91744 to 50413. [2021-06-05 07:16:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-06-05 07:16:37,333 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-06-05 07:16:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:37,333 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-06-05 07:16:37,334 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 07:16:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-06-05 07:16:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:37,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:37,410 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:37,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 07:16:37,611 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:37,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:37,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1812767055, now seen corresponding path program 182 times [2021-06-05 07:16:37,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:37,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69455770] [2021-06-05 07:16:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:37,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69455770] [2021-06-05 07:16:37,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69455770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905530965] [2021-06-05 07:16:37,832 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 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 07:16:37,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:16:37,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:16:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:38,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:38,091 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 07:16:38,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:16:38,184 INFO L628 ElimStorePlain]: treesize reduction 150, result has 31.5 percent of original size [2021-06-05 07:16:38,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 07:16:38,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:88 [2021-06-05 07:16:38,502 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-06-05 07:16:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:38,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905530965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:38,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:38,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 07:16:38,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985663754] [2021-06-05 07:16:38,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:16:38,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:16:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:16:38,516 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 07:16:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:40,928 INFO L93 Difference]: Finished difference Result 72565 states and 275989 transitions. [2021-06-05 07:16:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:16:40,928 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:16:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:41,308 INFO L225 Difference]: With dead ends: 72565 [2021-06-05 07:16:41,308 INFO L226 Difference]: Without dead ends: 72535 [2021-06-05 07:16:41,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1923.9ms TimeCoverageRelationStatistics Valid=404, Invalid=2352, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:16:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72535 states. [2021-06-05 07:16:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72535 to 50413. [2021-06-05 07:16:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-06-05 07:16:42,550 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-06-05 07:16:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:42,550 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-06-05 07:16:42,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:16:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-06-05 07:16:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:42,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:42,623 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:42,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-06-05 07:16:42,824 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash -215630961, now seen corresponding path program 183 times [2021-06-05 07:16:42,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:42,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986961753] [2021-06-05 07:16:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:43,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:43,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986961753] [2021-06-05 07:16:43,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986961753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:43,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737095475] [2021-06-05 07:16:43,045 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 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 07:16:43,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:16:43,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:43,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:16:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:43,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:43,296 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 07:16:43,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:16:43,401 INFO L628 ElimStorePlain]: treesize reduction 131, result has 36.7 percent of original size [2021-06-05 07:16:43,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 07:16:43,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:69 [2021-06-05 07:16:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:43,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737095475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:43,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:43,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 07:16:43,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032482151] [2021-06-05 07:16:43,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:16:43,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:43,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:16:43,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:16:43,480 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 07:16:44,961 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-06-05 07:16:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:46,155 INFO L93 Difference]: Finished difference Result 72583 states and 276055 transitions. [2021-06-05 07:16:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:16:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:16:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:46,337 INFO L225 Difference]: With dead ends: 72583 [2021-06-05 07:16:46,337 INFO L226 Difference]: Without dead ends: 72568 [2021-06-05 07:16:46,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1937.2ms TimeCoverageRelationStatistics Valid=486, Invalid=2936, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:16:46,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72568 states. [2021-06-05 07:16:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72568 to 50379. [2021-06-05 07:16:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50379 states, 50378 states have (on average 3.8765334074397555) internal successors, (195292), 50378 states have internal predecessors, (195292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50379 states to 50379 states and 195292 transitions. [2021-06-05 07:16:47,673 INFO L78 Accepts]: Start accepts. Automaton has 50379 states and 195292 transitions. Word has length 30 [2021-06-05 07:16:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:47,673 INFO L482 AbstractCegarLoop]: Abstraction has 50379 states and 195292 transitions. [2021-06-05 07:16:47,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:16:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 50379 states and 195292 transitions. [2021-06-05 07:16:47,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:47,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:47,748 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:47,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:47,949 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:47,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:47,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2141926627, now seen corresponding path program 184 times [2021-06-05 07:16:47,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:47,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480642942] [2021-06-05 07:16:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:48,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:48,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480642942] [2021-06-05 07:16:48,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480642942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:48,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900512393] [2021-06-05 07:16:48,103 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 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 07:16:48,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:16:48,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:48,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:16:48,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:48,357 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 07:16:48,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:48,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:48,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:48,603 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:16:48,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:48,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:48,609 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 07:16:48,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 07:16:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:48,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900512393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:48,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:48,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:16:48,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804198028] [2021-06-05 07:16:48,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:16:48,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:48,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:16:48,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:16:48,622 INFO L87 Difference]: Start difference. First operand 50379 states and 195292 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 07:16:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:50,412 INFO L93 Difference]: Finished difference Result 74068 states and 280349 transitions. [2021-06-05 07:16:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:16:50,413 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 07:16:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:50,597 INFO L225 Difference]: With dead ends: 74068 [2021-06-05 07:16:50,597 INFO L226 Difference]: Without dead ends: 74038 [2021-06-05 07:16:50,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1126.9ms TimeCoverageRelationStatistics Valid=496, Invalid=2366, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:16:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74038 states. [2021-06-05 07:16:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74038 to 50389. [2021-06-05 07:16:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50389 states, 50388 states have (on average 3.8765579106136383) internal successors, (195332), 50388 states have internal predecessors, (195332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50389 states to 50389 states and 195332 transitions. [2021-06-05 07:16:52,036 INFO L78 Accepts]: Start accepts. Automaton has 50389 states and 195332 transitions. Word has length 30 [2021-06-05 07:16:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:52,036 INFO L482 AbstractCegarLoop]: Abstraction has 50389 states and 195332 transitions. [2021-06-05 07:16:52,036 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 07:16:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 50389 states and 195332 transitions. [2021-06-05 07:16:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:52,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:52,116 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:52,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:16:52,317 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1974117535, now seen corresponding path program 185 times [2021-06-05 07:16:52,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:52,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876538360] [2021-06-05 07:16:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:52,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:52,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876538360] [2021-06-05 07:16:52,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876538360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:52,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997787838] [2021-06-05 07:16:52,484 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 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 07:16:52,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:16:52,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:52,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:16:52,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:52,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:52,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:16:52,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-05 07:16:52,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:16:52,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:52,736 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 07:16:52,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:7 [2021-06-05 07:16:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:52,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997787838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:52,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:52,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 07:16:52,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895426745] [2021-06-05 07:16:52,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:16:52,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:16:52,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:16:52,755 INFO L87 Difference]: Start difference. First operand 50389 states and 195332 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 07:16:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:16:53,845 INFO L93 Difference]: Finished difference Result 60193 states and 228714 transitions. [2021-06-05 07:16:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:16:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 07:16:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:16:54,248 INFO L225 Difference]: With dead ends: 60193 [2021-06-05 07:16:54,248 INFO L226 Difference]: Without dead ends: 60178 [2021-06-05 07:16:54,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:16:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60178 states. [2021-06-05 07:16:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60178 to 50385. [2021-06-05 07:16:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50385 states, 50384 states have (on average 3.876587805652588) internal successors, (195318), 50384 states have internal predecessors, (195318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:16:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50385 states to 50385 states and 195318 transitions. [2021-06-05 07:16:55,518 INFO L78 Accepts]: Start accepts. Automaton has 50385 states and 195318 transitions. Word has length 30 [2021-06-05 07:16:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:16:55,518 INFO L482 AbstractCegarLoop]: Abstraction has 50385 states and 195318 transitions. [2021-06-05 07:16:55,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 07:16:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 50385 states and 195318 transitions. [2021-06-05 07:16:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:16:55,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:16:55,594 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:16:55,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-05 07:16:55,794 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:16:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:16:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash -93398493, now seen corresponding path program 186 times [2021-06-05 07:16:55,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:16:55,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814500783] [2021-06-05 07:16:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:16:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:16:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:55,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:16:55,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814500783] [2021-06-05 07:16:55,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814500783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:55,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120898537] [2021-06-05 07:16:55,959 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 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 07:16:55,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:16:55,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:16:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 07:16:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:16:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:16:56,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:16:56,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 61 [2021-06-05 07:16:56,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 07:16:56,305 INFO L628 ElimStorePlain]: treesize reduction 242, result has 13.3 percent of original size [2021-06-05 07:16:56,307 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 07:16:56,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:55 [2021-06-05 07:16:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:16:56,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120898537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:16:56,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:16:56,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-06-05 07:16:56,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106687162] [2021-06-05 07:16:56,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:16:56,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:16:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:16:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:16:56,447 INFO L87 Difference]: Start difference. First operand 50385 states and 195318 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 07:16:58,079 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 07:17:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:00,995 INFO L93 Difference]: Finished difference Result 78681 states and 297156 transitions. [2021-06-05 07:17:00,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 07:17:00,995 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 07:17:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:01,165 INFO L225 Difference]: With dead ends: 78681 [2021-06-05 07:17:01,165 INFO L226 Difference]: Without dead ends: 78666 [2021-06-05 07:17:01,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 3009.4ms TimeCoverageRelationStatistics Valid=1045, Invalid=6611, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 07:17:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78666 states. [2021-06-05 07:17:02,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78666 to 50388. [2021-06-05 07:17:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50388 states, 50387 states have (on average 3.876654692678667) internal successors, (195333), 50387 states have internal predecessors, (195333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50388 states to 50388 states and 195333 transitions. [2021-06-05 07:17:02,442 INFO L78 Accepts]: Start accepts. Automaton has 50388 states and 195333 transitions. Word has length 30 [2021-06-05 07:17:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:02,443 INFO L482 AbstractCegarLoop]: Abstraction has 50388 states and 195333 transitions. [2021-06-05 07:17:02,443 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 07:17:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 50388 states and 195333 transitions. [2021-06-05 07:17:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:02,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:02,515 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:02,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 07:17:02,716 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:02,716 INFO L82 PathProgramCache]: Analyzing trace with hash -590119853, now seen corresponding path program 187 times [2021-06-05 07:17:02,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:02,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235762437] [2021-06-05 07:17:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:02,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235762437] [2021-06-05 07:17:02,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235762437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610500430] [2021-06-05 07:17:02,934 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 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 07:17:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:02,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:17:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:03,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:03,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:03,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:03,172 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:17:03,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:03,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:03,178 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 07:17:03,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 07:17:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:03,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610500430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:03,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:03,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:17:03,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024275985] [2021-06-05 07:17:03,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:17:03,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:03,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:17:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:17:03,193 INFO L87 Difference]: Start difference. First operand 50388 states and 195333 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) 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 07:17:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:05,111 INFO L93 Difference]: Finished difference Result 77532 states and 294234 transitions. [2021-06-05 07:17:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:17:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:17:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:05,302 INFO L225 Difference]: With dead ends: 77532 [2021-06-05 07:17:05,302 INFO L226 Difference]: Without dead ends: 77517 [2021-06-05 07:17:05,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1097.4ms TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:17:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77517 states. [2021-06-05 07:17:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77517 to 50404. [2021-06-05 07:17:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50404 states, 50403 states have (on average 3.8768724083883894) internal successors, (195406), 50403 states have internal predecessors, (195406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50404 states to 50404 states and 195406 transitions. [2021-06-05 07:17:06,753 INFO L78 Accepts]: Start accepts. Automaton has 50404 states and 195406 transitions. Word has length 30 [2021-06-05 07:17:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:06,753 INFO L482 AbstractCegarLoop]: Abstraction has 50404 states and 195406 transitions. [2021-06-05 07:17:06,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:17:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 50404 states and 195406 transitions. [2021-06-05 07:17:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:06,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:06,829 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:07,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-05 07:17:07,029 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:07,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2087314663, now seen corresponding path program 188 times [2021-06-05 07:17:07,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:07,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001927953] [2021-06-05 07:17:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:07,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001927953] [2021-06-05 07:17:07,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001927953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853154959] [2021-06-05 07:17:07,187 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 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 07:17:07,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:17:07,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:17:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:07,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:07,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:07,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:07,402 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 37 [2021-06-05 07:17:07,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:17:07,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:07,415 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 07:17:07,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 07:17:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:07,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853154959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:07,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:07,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:17:07,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166320911] [2021-06-05 07:17:07,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:17:07,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:07,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:17:07,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:17:07,456 INFO L87 Difference]: Start difference. First operand 50404 states and 195406 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 07:17:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:09,959 INFO L93 Difference]: Finished difference Result 79064 states and 298479 transitions. [2021-06-05 07:17:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:17:09,959 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 07:17:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:10,158 INFO L225 Difference]: With dead ends: 79064 [2021-06-05 07:17:10,158 INFO L226 Difference]: Without dead ends: 79034 [2021-06-05 07:17:10,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 1581.3ms TimeCoverageRelationStatistics Valid=813, Invalid=3743, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:17:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79034 states. [2021-06-05 07:17:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79034 to 50410. [2021-06-05 07:17:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50410 states, 50409 states have (on average 3.876986252454919) internal successors, (195435), 50409 states have internal predecessors, (195435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50410 states to 50410 states and 195435 transitions. [2021-06-05 07:17:11,608 INFO L78 Accepts]: Start accepts. Automaton has 50410 states and 195435 transitions. Word has length 30 [2021-06-05 07:17:11,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:11,608 INFO L482 AbstractCegarLoop]: Abstraction has 50410 states and 195435 transitions. [2021-06-05 07:17:11,608 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 07:17:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 50410 states and 195435 transitions. [2021-06-05 07:17:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:11,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:11,680 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:11,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:11,880 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:11,880 INFO L82 PathProgramCache]: Analyzing trace with hash 304550503, now seen corresponding path program 189 times [2021-06-05 07:17:11,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:11,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892420991] [2021-06-05 07:17:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:12,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:12,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892420991] [2021-06-05 07:17:12,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892420991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:12,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960667356] [2021-06-05 07:17:12,110 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 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 07:17:12,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:17:12,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:12,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:17:12,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:12,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:12,374 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 07:17:12,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:17:12,485 INFO L628 ElimStorePlain]: treesize reduction 150, result has 35.9 percent of original size [2021-06-05 07:17:12,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 07:17:12,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:94 [2021-06-05 07:17:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:12,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960667356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:12,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:12,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 07:17:12,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203038623] [2021-06-05 07:17:12,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:17:12,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:17:12,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:17:12,568 INFO L87 Difference]: Start difference. First operand 50410 states and 195435 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 07:17:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:16,021 INFO L93 Difference]: Finished difference Result 78571 states and 297050 transitions. [2021-06-05 07:17:16,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:17:16,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:17:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:16,220 INFO L225 Difference]: With dead ends: 78571 [2021-06-05 07:17:16,220 INFO L226 Difference]: Without dead ends: 78556 [2021-06-05 07:17:16,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2493.5ms TimeCoverageRelationStatistics Valid=709, Invalid=3847, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:17:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78556 states. [2021-06-05 07:17:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78556 to 50420. [2021-06-05 07:17:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50420 states, 50419 states have (on average 3.8771296535036397) internal successors, (195481), 50419 states have internal predecessors, (195481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50420 states to 50420 states and 195481 transitions. [2021-06-05 07:17:17,763 INFO L78 Accepts]: Start accepts. Automaton has 50420 states and 195481 transitions. Word has length 30 [2021-06-05 07:17:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:17,763 INFO L482 AbstractCegarLoop]: Abstraction has 50420 states and 195481 transitions. [2021-06-05 07:17:17,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:17:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 50420 states and 195481 transitions. [2021-06-05 07:17:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:17,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:17,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:18,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:18,040 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:18,041 INFO L82 PathProgramCache]: Analyzing trace with hash 878613223, now seen corresponding path program 190 times [2021-06-05 07:17:18,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:18,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245860406] [2021-06-05 07:17:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:18,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:18,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245860406] [2021-06-05 07:17:18,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245860406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:18,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600859017] [2021-06-05 07:17:18,190 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 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 07:17:18,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:17:18,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:18,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:17:18,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:18,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:18,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:18,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:18,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:18,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:18,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:18,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:17:18,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:18,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:18,502 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 07:17:18,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 07:17:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:18,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600859017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:18,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:18,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:17:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220341222] [2021-06-05 07:17:18,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:17:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:17:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:17:18,520 INFO L87 Difference]: Start difference. First operand 50420 states and 195481 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 07:17:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:24,848 INFO L93 Difference]: Finished difference Result 96588 states and 356674 transitions. [2021-06-05 07:17:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 07:17:24,848 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 07:17:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:25,090 INFO L225 Difference]: With dead ends: 96588 [2021-06-05 07:17:25,090 INFO L226 Difference]: Without dead ends: 96543 [2021-06-05 07:17:25,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 4053.3ms TimeCoverageRelationStatistics Valid=1133, Invalid=8373, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 07:17:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96543 states. [2021-06-05 07:17:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96543 to 50456. [2021-06-05 07:17:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 3.877653354474284) internal successors, (195647), 50455 states have internal predecessors, (195647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195647 transitions. [2021-06-05 07:17:26,626 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195647 transitions. Word has length 30 [2021-06-05 07:17:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:26,626 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195647 transitions. [2021-06-05 07:17:26,626 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 07:17:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195647 transitions. [2021-06-05 07:17:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:26,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:26,700 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:26,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:26,901 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash 276888099, now seen corresponding path program 191 times [2021-06-05 07:17:26,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:26,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998276226] [2021-06-05 07:17:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:27,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:27,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998276226] [2021-06-05 07:17:27,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998276226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:27,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597505596] [2021-06-05 07:17:27,299 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 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 07:17:27,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:17:27,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:17:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:27,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:27,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:27,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:27,511 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 37 [2021-06-05 07:17:27,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:17:27,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:27,525 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 07:17:27,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 07:17:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:27,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597505596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:27,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:27,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:17:27,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859715659] [2021-06-05 07:17:27,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:17:27,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:27,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:17:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:17:27,565 INFO L87 Difference]: Start difference. First operand 50456 states and 195647 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 07:17:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:30,117 INFO L93 Difference]: Finished difference Result 81340 states and 306603 transitions. [2021-06-05 07:17:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:17:30,118 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 07:17:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:30,310 INFO L225 Difference]: With dead ends: 81340 [2021-06-05 07:17:30,310 INFO L226 Difference]: Without dead ends: 81310 [2021-06-05 07:17:30,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1430.9ms TimeCoverageRelationStatistics Valid=729, Invalid=2931, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:17:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81310 states. [2021-06-05 07:17:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81310 to 50462. [2021-06-05 07:17:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50462 states, 50461 states have (on average 3.877945343928975) internal successors, (195685), 50461 states have internal predecessors, (195685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50462 states to 50462 states and 195685 transitions. [2021-06-05 07:17:31,617 INFO L78 Accepts]: Start accepts. Automaton has 50462 states and 195685 transitions. Word has length 30 [2021-06-05 07:17:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:31,617 INFO L482 AbstractCegarLoop]: Abstraction has 50462 states and 195685 transitions. [2021-06-05 07:17:31,617 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 07:17:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 50462 states and 195685 transitions. [2021-06-05 07:17:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:31,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:31,689 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:31,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:31,890 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:31,890 INFO L82 PathProgramCache]: Analyzing trace with hash 297624627, now seen corresponding path program 192 times [2021-06-05 07:17:31,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:31,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078574121] [2021-06-05 07:17:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:32,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:32,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078574121] [2021-06-05 07:17:32,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078574121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:32,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100416564] [2021-06-05 07:17:32,140 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 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 07:17:32,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:17:32,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:32,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 07:17:32,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:32,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:32,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:32,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:32,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:32,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:32,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:32,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-06-05 07:17:32,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:17:32,456 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.7 percent of original size [2021-06-05 07:17:32,458 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 07:17:32,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:35 [2021-06-05 07:17:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:32,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100416564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:32,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:32,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-06-05 07:17:32,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781582682] [2021-06-05 07:17:32,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:17:32,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:17:32,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:17:32,502 INFO L87 Difference]: Start difference. First operand 50462 states and 195685 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 07:17:33,467 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-05 07:17:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:35,706 INFO L93 Difference]: Finished difference Result 79161 states and 299995 transitions. [2021-06-05 07:17:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:17:35,706 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 07:17:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:35,902 INFO L225 Difference]: With dead ends: 79161 [2021-06-05 07:17:35,902 INFO L226 Difference]: Without dead ends: 79131 [2021-06-05 07:17:35,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2291.0ms TimeCoverageRelationStatistics Valid=660, Invalid=3372, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:17:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79131 states. [2021-06-05 07:17:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79131 to 50460. [2021-06-05 07:17:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50460 states, 50459 states have (on average 3.877960324223627) internal successors, (195678), 50459 states have internal predecessors, (195678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50460 states to 50460 states and 195678 transitions. [2021-06-05 07:17:37,386 INFO L78 Accepts]: Start accepts. Automaton has 50460 states and 195678 transitions. Word has length 30 [2021-06-05 07:17:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:37,386 INFO L482 AbstractCegarLoop]: Abstraction has 50460 states and 195678 transitions. [2021-06-05 07:17:37,386 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 07:17:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 50460 states and 195678 transitions. [2021-06-05 07:17:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:37,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:37,471 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:37,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 07:17:37,672 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:37,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2080925591, now seen corresponding path program 193 times [2021-06-05 07:17:37,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:37,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193615319] [2021-06-05 07:17:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:37,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:37,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193615319] [2021-06-05 07:17:37,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193615319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:37,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950060773] [2021-06-05 07:17:37,819 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 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 07:17:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:17:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:38,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:38,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:38,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:38,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:17:38,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:17:38,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:38,117 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 07:17:38,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 07:17:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:38,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950060773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:38,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:38,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:17:38,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014268379] [2021-06-05 07:17:38,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:17:38,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:38,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:17:38,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:17:38,134 INFO L87 Difference]: Start difference. First operand 50460 states and 195678 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 07:17:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:43,637 INFO L93 Difference]: Finished difference Result 95802 states and 354482 transitions. [2021-06-05 07:17:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 07:17:43,637 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 07:17:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:43,867 INFO L225 Difference]: With dead ends: 95802 [2021-06-05 07:17:43,867 INFO L226 Difference]: Without dead ends: 95757 [2021-06-05 07:17:43,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 3836.4ms TimeCoverageRelationStatistics Valid=1115, Invalid=7441, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 07:17:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95757 states. [2021-06-05 07:17:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95757 to 50464. [2021-06-05 07:17:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50464 states, 50463 states have (on average 3.8779898143194025) internal successors, (195695), 50463 states have internal predecessors, (195695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50464 states to 50464 states and 195695 transitions. [2021-06-05 07:17:45,385 INFO L78 Accepts]: Start accepts. Automaton has 50464 states and 195695 transitions. Word has length 30 [2021-06-05 07:17:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:45,385 INFO L482 AbstractCegarLoop]: Abstraction has 50464 states and 195695 transitions. [2021-06-05 07:17:45,385 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 07:17:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 50464 states and 195695 transitions. [2021-06-05 07:17:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:45,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:45,458 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:45,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:45,659 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash -380393053, now seen corresponding path program 194 times [2021-06-05 07:17:45,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:45,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304859143] [2021-06-05 07:17:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:45,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:45,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304859143] [2021-06-05 07:17:45,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304859143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:45,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870149805] [2021-06-05 07:17:45,818 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 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 07:17:45,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:17:45,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:45,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:17:45,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:46,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:46,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:46,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:46,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:17:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:46,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:17:46,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:46,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 07:17:46,024 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:17:46,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:46,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:17:46,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 07:17:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:46,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870149805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:46,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:46,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:17:46,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049500918] [2021-06-05 07:17:46,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:17:46,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:46,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:17:46,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:17:46,075 INFO L87 Difference]: Start difference. First operand 50464 states and 195695 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 07:17:46,409 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 07:17:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:51,892 INFO L93 Difference]: Finished difference Result 97872 states and 363697 transitions. [2021-06-05 07:17:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 07:17:51,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 07:17:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:52,129 INFO L225 Difference]: With dead ends: 97872 [2021-06-05 07:17:52,129 INFO L226 Difference]: Without dead ends: 97842 [2021-06-05 07:17:52,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 4147.4ms TimeCoverageRelationStatistics Valid=1175, Invalid=8725, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 07:17:52,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97842 states. [2021-06-05 07:17:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97842 to 50467. [2021-06-05 07:17:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50467 states, 50466 states have (on average 3.8780565132960807) internal successors, (195710), 50466 states have internal predecessors, (195710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50467 states to 50467 states and 195710 transitions. [2021-06-05 07:17:53,679 INFO L78 Accepts]: Start accepts. Automaton has 50467 states and 195710 transitions. Word has length 30 [2021-06-05 07:17:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:53,679 INFO L482 AbstractCegarLoop]: Abstraction has 50467 states and 195710 transitions. [2021-06-05 07:17:53,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 07:17:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 50467 states and 195710 transitions. [2021-06-05 07:17:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:53,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:53,752 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:53,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:17:53,953 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash -303306601, now seen corresponding path program 195 times [2021-06-05 07:17:53,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:53,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194751994] [2021-06-05 07:17:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:54,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:54,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194751994] [2021-06-05 07:17:54,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194751994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:54,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372135278] [2021-06-05 07:17:54,180 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 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 07:17:54,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:17:54,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:17:54,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:17:54,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:17:54,437 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 07:17:54,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:17:54,545 INFO L628 ElimStorePlain]: treesize reduction 131, result has 37.9 percent of original size [2021-06-05 07:17:54,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 07:17:54,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:90 [2021-06-05 07:17:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:54,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372135278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:54,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:17:54,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 07:17:54,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191853075] [2021-06-05 07:17:54,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:17:54,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:17:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:17:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:17:54,625 INFO L87 Difference]: Start difference. First operand 50467 states and 195710 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 07:17:55,832 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-06-05 07:17:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:17:57,762 INFO L93 Difference]: Finished difference Result 73646 states and 278776 transitions. [2021-06-05 07:17:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:17:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:17:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:17:57,945 INFO L225 Difference]: With dead ends: 73646 [2021-06-05 07:17:57,945 INFO L226 Difference]: Without dead ends: 73631 [2021-06-05 07:17:57,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2422.9ms TimeCoverageRelationStatistics Valid=459, Invalid=2621, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:17:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73631 states. [2021-06-05 07:17:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73631 to 50482. [2021-06-05 07:17:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50482 states, 50481 states have (on average 3.878171985499495) internal successors, (195774), 50481 states have internal predecessors, (195774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:17:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50482 states to 50482 states and 195774 transitions. [2021-06-05 07:17:59,472 INFO L78 Accepts]: Start accepts. Automaton has 50482 states and 195774 transitions. Word has length 30 [2021-06-05 07:17:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:17:59,473 INFO L482 AbstractCegarLoop]: Abstraction has 50482 states and 195774 transitions. [2021-06-05 07:17:59,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 07:17:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 50482 states and 195774 transitions. [2021-06-05 07:17:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:17:59,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:17:59,552 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:17:59,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 07:17:59,752 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:17:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:17:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash 270756119, now seen corresponding path program 196 times [2021-06-05 07:17:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:17:59,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18624019] [2021-06-05 07:17:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:17:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:17:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:17:59,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:17:59,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18624019] [2021-06-05 07:17:59,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18624019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:17:59,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971486304] [2021-06-05 07:17:59,890 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 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 07:17:59,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:17:59,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:17:59,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:17:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:00,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:00,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:00,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:00,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:18:00,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:18:00,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:00,215 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 07:18:00,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 07:18:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:00,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971486304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:00,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:00,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:18:00,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063570578] [2021-06-05 07:18:00,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:18:00,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:18:00,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:18:00,233 INFO L87 Difference]: Start difference. First operand 50482 states and 195774 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 07:18:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:06,047 INFO L93 Difference]: Finished difference Result 89554 states and 331893 transitions. [2021-06-05 07:18:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 07:18:06,047 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 07:18:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:06,255 INFO L225 Difference]: With dead ends: 89554 [2021-06-05 07:18:06,255 INFO L226 Difference]: Without dead ends: 89509 [2021-06-05 07:18:06,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 3762.6ms TimeCoverageRelationStatistics Valid=898, Invalid=7474, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 07:18:06,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89509 states. [2021-06-05 07:18:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89509 to 50513. [2021-06-05 07:18:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50513 states, 50512 states have (on average 3.8782467532467533) internal successors, (195898), 50512 states have internal predecessors, (195898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50513 states to 50513 states and 195898 transitions. [2021-06-05 07:18:07,716 INFO L78 Accepts]: Start accepts. Automaton has 50513 states and 195898 transitions. Word has length 30 [2021-06-05 07:18:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:07,716 INFO L482 AbstractCegarLoop]: Abstraction has 50513 states and 195898 transitions. [2021-06-05 07:18:07,716 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 07:18:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 50513 states and 195898 transitions. [2021-06-05 07:18:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:18:07,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:07,789 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:07,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:07,989 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1364847707, now seen corresponding path program 197 times [2021-06-05 07:18:07,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:07,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455292947] [2021-06-05 07:18:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:08,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:08,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455292947] [2021-06-05 07:18:08,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455292947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:08,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597469186] [2021-06-05 07:18:08,126 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 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 07:18:08,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:18:08,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:08,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:18:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:08,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:08,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:08,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:08,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:08,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:08,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:08,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:08,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 49 [2021-06-05 07:18:08,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:18:08,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:08,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:18:08,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-06-05 07:18:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:08,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597469186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:08,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:08,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:18:08,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497482427] [2021-06-05 07:18:08,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:18:08,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:08,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:18:08,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:18:08,383 INFO L87 Difference]: Start difference. First operand 50513 states and 195898 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 07:18:14,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:14,577 INFO L93 Difference]: Finished difference Result 88714 states and 329526 transitions. [2021-06-05 07:18:14,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 07:18:14,577 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 07:18:14,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:14,784 INFO L225 Difference]: With dead ends: 88714 [2021-06-05 07:18:14,784 INFO L226 Difference]: Without dead ends: 88684 [2021-06-05 07:18:14,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 3934.4ms TimeCoverageRelationStatistics Valid=976, Invalid=10366, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 07:18:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88684 states. [2021-06-05 07:18:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88684 to 50507. [2021-06-05 07:18:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50507 states, 50506 states have (on average 3.8780936918385933) internal successors, (195867), 50506 states have internal predecessors, (195867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50507 states to 50507 states and 195867 transitions. [2021-06-05 07:18:16,224 INFO L78 Accepts]: Start accepts. Automaton has 50507 states and 195867 transitions. Word has length 30 [2021-06-05 07:18:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:16,224 INFO L482 AbstractCegarLoop]: Abstraction has 50507 states and 195867 transitions. [2021-06-05 07:18:16,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 07:18:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 50507 states and 195867 transitions. [2021-06-05 07:18:16,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:18:16,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:16,300 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:16,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-06-05 07:18:16,500 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash -781323053, now seen corresponding path program 198 times [2021-06-05 07:18:16,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:16,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105289261] [2021-06-05 07:18:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:16,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:16,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105289261] [2021-06-05 07:18:16,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105289261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:16,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458529470] [2021-06-05 07:18:16,637 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 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 07:18:16,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:18:16,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:18:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:16,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:16,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:16,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:16,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:16,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:16,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:16,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 07:18:16,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:18:16,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:16,895 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 07:18:16,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 07:18:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:16,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458529470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:16,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:16,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:18:16,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966142596] [2021-06-05 07:18:16,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:18:16,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:18:16,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:18:16,913 INFO L87 Difference]: Start difference. First operand 50507 states and 195867 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 07:18:18,660 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-05 07:18:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:22,075 INFO L93 Difference]: Finished difference Result 99478 states and 365820 transitions. [2021-06-05 07:18:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:18:22,076 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 07:18:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:22,344 INFO L225 Difference]: With dead ends: 99478 [2021-06-05 07:18:22,344 INFO L226 Difference]: Without dead ends: 99448 [2021-06-05 07:18:22,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 3729.8ms TimeCoverageRelationStatistics Valid=1062, Invalid=7868, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 07:18:22,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99448 states. [2021-06-05 07:18:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99448 to 50525. [2021-06-05 07:18:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50525 states, 50524 states have (on average 3.8780777452299895) internal successors, (195936), 50524 states have internal predecessors, (195936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50525 states to 50525 states and 195936 transitions. [2021-06-05 07:18:23,905 INFO L78 Accepts]: Start accepts. Automaton has 50525 states and 195936 transitions. Word has length 30 [2021-06-05 07:18:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:23,905 INFO L482 AbstractCegarLoop]: Abstraction has 50525 states and 195936 transitions. [2021-06-05 07:18:23,905 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 07:18:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 50525 states and 195936 transitions. [2021-06-05 07:18:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:18:23,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:23,982 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:24,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:24,182 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash 25852971, now seen corresponding path program 199 times [2021-06-05 07:18:24,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:24,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103727544] [2021-06-05 07:18:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:24,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103727544] [2021-06-05 07:18:24,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103727544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:24,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296758152] [2021-06-05 07:18:24,403 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 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 07:18:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:24,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:18:24,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:24,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:24,624 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:18:24,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:18:24,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:24,629 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 07:18:24,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 07:18:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:24,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296758152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:24,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:24,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:18:24,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781274492] [2021-06-05 07:18:24,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:18:24,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:24,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:18:24,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:18:24,644 INFO L87 Difference]: Start difference. First operand 50525 states and 195936 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) 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 07:18:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:26,797 INFO L93 Difference]: Finished difference Result 77721 states and 294719 transitions. [2021-06-05 07:18:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:18:26,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:18:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:26,985 INFO L225 Difference]: With dead ends: 77721 [2021-06-05 07:18:26,986 INFO L226 Difference]: Without dead ends: 77706 [2021-06-05 07:18:26,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1229.2ms TimeCoverageRelationStatistics Valid=400, Invalid=1670, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:18:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77706 states. [2021-06-05 07:18:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77706 to 50552. [2021-06-05 07:18:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50552 states, 50551 states have (on average 3.878043955609187) internal successors, (196039), 50551 states have internal predecessors, (196039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50552 states to 50552 states and 196039 transitions. [2021-06-05 07:18:28,552 INFO L78 Accepts]: Start accepts. Automaton has 50552 states and 196039 transitions. Word has length 30 [2021-06-05 07:18:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:28,552 INFO L482 AbstractCegarLoop]: Abstraction has 50552 states and 196039 transitions. [2021-06-05 07:18:28,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:18:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 50552 states and 196039 transitions. [2021-06-05 07:18:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:18:28,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:28,630 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:28,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-06-05 07:18:28,830 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1615723347, now seen corresponding path program 200 times [2021-06-05 07:18:28,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:28,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266843379] [2021-06-05 07:18:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:29,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:29,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266843379] [2021-06-05 07:18:29,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266843379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:29,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956988449] [2021-06-05 07:18:29,051 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 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 07:18:29,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:18:29,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:18:29,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:29,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:29,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:29,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:29,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-06-05 07:18:29,218 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 07:18:29,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:29,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:18:29,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 07:18:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:29,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956988449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:29,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:29,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:18:29,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706673823] [2021-06-05 07:18:29,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:18:29,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:29,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:18:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:18:29,256 INFO L87 Difference]: Start difference. First operand 50552 states and 196039 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 07:18:31,181 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-06-05 07:18:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:31,705 INFO L93 Difference]: Finished difference Result 77561 states and 294327 transitions. [2021-06-05 07:18:31,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:18:31,705 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 07:18:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:31,890 INFO L225 Difference]: With dead ends: 77561 [2021-06-05 07:18:31,890 INFO L226 Difference]: Without dead ends: 77546 [2021-06-05 07:18:31,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1775.9ms TimeCoverageRelationStatistics Valid=480, Invalid=2600, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:18:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77546 states. [2021-06-05 07:18:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77546 to 50543. [2021-06-05 07:18:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50543 states, 50542 states have (on average 3.8782596652289185) internal successors, (196015), 50542 states have internal predecessors, (196015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50543 states to 50543 states and 196015 transitions. [2021-06-05 07:18:33,256 INFO L78 Accepts]: Start accepts. Automaton has 50543 states and 196015 transitions. Word has length 30 [2021-06-05 07:18:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:33,256 INFO L482 AbstractCegarLoop]: Abstraction has 50543 states and 196015 transitions. [2021-06-05 07:18:33,256 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 07:18:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand 50543 states and 196015 transitions. [2021-06-05 07:18:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:18:33,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:33,330 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:33,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:33,531 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:33,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2130621987, now seen corresponding path program 201 times [2021-06-05 07:18:33,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:33,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525691226] [2021-06-05 07:18:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:33,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:33,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525691226] [2021-06-05 07:18:33,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525691226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:33,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632575795] [2021-06-05 07:18:33,677 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 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 07:18:33,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:18:33,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:33,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:18:33,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:33,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:33,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:33,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:33,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 57 [2021-06-05 07:18:33,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:18:33,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:33,933 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 07:18:33,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-06-05 07:18:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:33,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632575795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:33,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:33,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:18:33,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406138024] [2021-06-05 07:18:33,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:18:33,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:33,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:18:33,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:18:33,985 INFO L87 Difference]: Start difference. First operand 50543 states and 196015 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 07:18:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:36,534 INFO L93 Difference]: Finished difference Result 98552 states and 363159 transitions. [2021-06-05 07:18:36,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:18:36,535 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 07:18:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:37,009 INFO L225 Difference]: With dead ends: 98552 [2021-06-05 07:18:37,009 INFO L226 Difference]: Without dead ends: 98537 [2021-06-05 07:18:37,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1570.6ms TimeCoverageRelationStatistics Valid=415, Invalid=2555, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:18:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98537 states. [2021-06-05 07:18:38,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98537 to 50554. [2021-06-05 07:18:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50554 states, 50553 states have (on average 3.8781872490257747) internal successors, (196054), 50553 states have internal predecessors, (196054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50554 states to 50554 states and 196054 transitions. [2021-06-05 07:18:38,429 INFO L78 Accepts]: Start accepts. Automaton has 50554 states and 196054 transitions. Word has length 30 [2021-06-05 07:18:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:38,429 INFO L482 AbstractCegarLoop]: Abstraction has 50554 states and 196054 transitions. [2021-06-05 07:18:38,429 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 07:18:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 50554 states and 196054 transitions. [2021-06-05 07:18:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:18:38,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:38,503 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:38,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 07:18:38,703 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash 636714265, now seen corresponding path program 202 times [2021-06-05 07:18:38,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:38,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597752578] [2021-06-05 07:18:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:38,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:38,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597752578] [2021-06-05 07:18:38,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597752578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:38,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37582133] [2021-06-05 07:18:38,840 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 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 07:18:38,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:18:38,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:38,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:18:38,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:39,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:39,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:39,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:39,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:39,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:39,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:39,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:39,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:39,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:39,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 07:18:39,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:18:39,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:39,153 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 07:18:39,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:15 [2021-06-05 07:18:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:39,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37582133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:39,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:39,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 07:18:39,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242223181] [2021-06-05 07:18:39,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:18:39,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:18:39,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:18:39,188 INFO L87 Difference]: Start difference. First operand 50554 states and 196054 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 07:18:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:43,673 INFO L93 Difference]: Finished difference Result 87806 states and 326906 transitions. [2021-06-05 07:18:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:18:43,673 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 07:18:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:43,880 INFO L225 Difference]: With dead ends: 87806 [2021-06-05 07:18:43,881 INFO L226 Difference]: Without dead ends: 87758 [2021-06-05 07:18:43,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 3215.7ms TimeCoverageRelationStatistics Valid=870, Invalid=6270, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:18:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87758 states. [2021-06-05 07:18:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87758 to 50572. [2021-06-05 07:18:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50572 states, 50571 states have (on average 3.877854897075399) internal successors, (196107), 50571 states have internal predecessors, (196107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50572 states to 50572 states and 196107 transitions. [2021-06-05 07:18:45,300 INFO L78 Accepts]: Start accepts. Automaton has 50572 states and 196107 transitions. Word has length 30 [2021-06-05 07:18:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:45,300 INFO L482 AbstractCegarLoop]: Abstraction has 50572 states and 196107 transitions. [2021-06-05 07:18:45,300 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 07:18:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 50572 states and 196107 transitions. [2021-06-05 07:18:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:18:45,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:45,375 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:45,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:45,576 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:45,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1155811945, now seen corresponding path program 203 times [2021-06-05 07:18:45,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:45,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696717847] [2021-06-05 07:18:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:45,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:45,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696717847] [2021-06-05 07:18:45,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696717847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:45,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886744637] [2021-06-05 07:18:45,730 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:45,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:18:45,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:18:45,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:46,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:46,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:46,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:18:46,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 07:18:46,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:18:46,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:46,069 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 07:18:46,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 07:18:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:46,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886744637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:46,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:46,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:18:46,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472542546] [2021-06-05 07:18:46,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:18:46,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:18:46,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:18:46,086 INFO L87 Difference]: Start difference. First operand 50572 states and 196107 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 07:18:47,197 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-06-05 07:18:51,972 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 07:18:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:52,565 INFO L93 Difference]: Finished difference Result 99700 states and 367419 transitions. [2021-06-05 07:18:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:18:52,565 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 07:18:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:18:52,815 INFO L225 Difference]: With dead ends: 99700 [2021-06-05 07:18:52,815 INFO L226 Difference]: Without dead ends: 99670 [2021-06-05 07:18:52,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 4660.8ms TimeCoverageRelationStatistics Valid=1197, Invalid=7545, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 07:18:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99670 states. [2021-06-05 07:18:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99670 to 50590. [2021-06-05 07:18:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:18:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-06-05 07:18:54,576 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-06-05 07:18:54,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:18:54,576 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-06-05 07:18:54,576 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 07:18:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-06-05 07:18:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:18:54,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:18:54,652 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:18:54,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:54,852 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:18:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:18:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1521622571, now seen corresponding path program 204 times [2021-06-05 07:18:54,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:18:54,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132879984] [2021-06-05 07:18:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:18:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:18:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:54,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:18:54,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132879984] [2021-06-05 07:18:54,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132879984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:54,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85187045] [2021-06-05 07:18:54,990 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:18:55,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:18:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:18:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:18:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:18:55,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:18:55,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:55,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 67 [2021-06-05 07:18:55,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:18:55,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:18:55,226 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 07:18:55,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-06-05 07:18:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:18:55,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85187045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:18:55,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:18:55,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:18:55,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49867278] [2021-06-05 07:18:55,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:18:55,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:18:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:18:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:18:55,303 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 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 07:18:57,365 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 07:18:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:18:59,905 INFO L93 Difference]: Finished difference Result 97442 states and 361782 transitions. [2021-06-05 07:18:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:18:59,906 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 07:18:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:00,313 INFO L225 Difference]: With dead ends: 97442 [2021-06-05 07:19:00,313 INFO L226 Difference]: Without dead ends: 97427 [2021-06-05 07:19:00,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 3226.6ms TimeCoverageRelationStatistics Valid=921, Invalid=5241, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 07:19:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97427 states. [2021-06-05 07:19:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97427 to 50590. [2021-06-05 07:19:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-06-05 07:19:01,755 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-06-05 07:19:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:01,755 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-06-05 07:19:01,755 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 07:19:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-06-05 07:19:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:19:01,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:01,830 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:02,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:02,030 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:02,030 INFO L82 PathProgramCache]: Analyzing trace with hash -725796723, now seen corresponding path program 205 times [2021-06-05 07:19:02,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:02,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63136481] [2021-06-05 07:19:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:02,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63136481] [2021-06-05 07:19:02,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63136481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318663623] [2021-06-05 07:19:02,203 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:02,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:19:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:02,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:02,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:02,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:19:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:02,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:19:02,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 07:19:02,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 07:19:02,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:19:02,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:19:02,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 07:19:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:02,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318663623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:02,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:02,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 07:19:02,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995913661] [2021-06-05 07:19:02,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:19:02,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:19:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:19:02,441 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) 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 07:19:03,673 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-05 07:19:04,132 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-06-05 07:19:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:05,735 INFO L93 Difference]: Finished difference Result 74459 states and 279252 transitions. [2021-06-05 07:19:05,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:19:05,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:19:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:05,912 INFO L225 Difference]: With dead ends: 74459 [2021-06-05 07:19:05,912 INFO L226 Difference]: Without dead ends: 74429 [2021-06-05 07:19:05,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2575.5ms TimeCoverageRelationStatistics Valid=596, Invalid=3064, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:19:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74429 states. [2021-06-05 07:19:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74429 to 50603. [2021-06-05 07:19:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50603 states, 50602 states have (on average 3.878364491522074) internal successors, (196253), 50602 states have internal predecessors, (196253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50603 states to 50603 states and 196253 transitions. [2021-06-05 07:19:07,442 INFO L78 Accepts]: Start accepts. Automaton has 50603 states and 196253 transitions. Word has length 30 [2021-06-05 07:19:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:07,442 INFO L482 AbstractCegarLoop]: Abstraction has 50603 states and 196253 transitions. [2021-06-05 07:19:07,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 07:19:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 50603 states and 196253 transitions. [2021-06-05 07:19:07,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:19:07,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:07,518 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:07,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:07,718 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1490477859, now seen corresponding path program 206 times [2021-06-05 07:19:07,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:07,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66165176] [2021-06-05 07:19:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:07,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:07,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66165176] [2021-06-05 07:19:07,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66165176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:07,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624408826] [2021-06-05 07:19:07,853 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:07,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:19:07,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:07,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:19:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:08,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:19:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:19:08,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 07:19:08,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:19:08,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:19:08,119 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 07:19:08,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 07:19:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:08,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624408826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:08,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:08,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:19:08,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249959679] [2021-06-05 07:19:08,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:19:08,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:19:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:19:08,136 INFO L87 Difference]: Start difference. First operand 50603 states and 196253 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 07:19:12,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:12,183 INFO L93 Difference]: Finished difference Result 88595 states and 329278 transitions. [2021-06-05 07:19:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 07:19:12,183 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 07:19:12,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:12,399 INFO L225 Difference]: With dead ends: 88595 [2021-06-05 07:19:12,399 INFO L226 Difference]: Without dead ends: 88580 [2021-06-05 07:19:12,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 2894.1ms TimeCoverageRelationStatistics Valid=752, Invalid=6054, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 07:19:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88580 states. [2021-06-05 07:19:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88580 to 50612. [2021-06-05 07:19:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-06-05 07:19:13,930 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-06-05 07:19:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:13,930 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-06-05 07:19:13,930 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 07:19:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-06-05 07:19:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:19:14,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:14,004 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:14,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 07:19:14,204 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:14,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1594859171, now seen corresponding path program 91 times [2021-06-05 07:19:14,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:14,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449085533] [2021-06-05 07:19:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:14,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:14,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449085533] [2021-06-05 07:19:14,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449085533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:14,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921628851] [2021-06-05 07:19:14,514 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:14,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:19:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:14,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:14,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:19:14,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:14,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:14,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:14,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:19:14,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:19:14,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 07:19:14,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:19:14,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:19:14,745 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 07:19:14,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-06-05 07:19:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:14,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921628851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:14,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:14,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 07:19:14,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546910098] [2021-06-05 07:19:14,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:19:14,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:14,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:19:14,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:19:14,760 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) 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 07:19:17,170 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-06-05 07:19:17,705 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-06-05 07:19:18,625 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-06-05 07:19:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:19,963 INFO L93 Difference]: Finished difference Result 64130 states and 241390 transitions. [2021-06-05 07:19:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:19:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) 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 07:19:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:20,113 INFO L225 Difference]: With dead ends: 64130 [2021-06-05 07:19:20,113 INFO L226 Difference]: Without dead ends: 64115 [2021-06-05 07:19:20,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 4093.4ms TimeCoverageRelationStatistics Valid=783, Invalid=4767, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 07:19:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64115 states. [2021-06-05 07:19:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64115 to 50612. [2021-06-05 07:19:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-06-05 07:19:21,296 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-06-05 07:19:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:21,296 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-06-05 07:19:21,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) 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 07:19:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-06-05 07:19:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:19:21,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:21,369 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:21,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-06-05 07:19:21,569 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:21,569 INFO L82 PathProgramCache]: Analyzing trace with hash -344679385, now seen corresponding path program 92 times [2021-06-05 07:19:21,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:21,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442751585] [2021-06-05 07:19:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:21,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:21,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442751585] [2021-06-05 07:19:21,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442751585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:21,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249180972] [2021-06-05 07:19:21,868 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:21,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:19:21,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:21,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:19:21,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:22,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:19:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:22,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:19:22,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:22,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:19:22,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 07:19:22,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:19:22,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:19:22,098 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 07:19:22,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-06-05 07:19:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:22,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249180972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:22,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:22,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 07:19:22,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092814767] [2021-06-05 07:19:22,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:19:22,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:22,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:19:22,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:19:22,113 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) 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 07:19:23,251 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 07:19:24,516 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-06-05 07:19:24,943 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-06-05 07:19:25,830 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-06-05 07:19:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:27,285 INFO L93 Difference]: Finished difference Result 64415 states and 242251 transitions. [2021-06-05 07:19:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:19:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) 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 07:19:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:27,442 INFO L225 Difference]: With dead ends: 64415 [2021-06-05 07:19:27,442 INFO L226 Difference]: Without dead ends: 64400 [2021-06-05 07:19:27,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 4071.3ms TimeCoverageRelationStatistics Valid=826, Invalid=4724, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 07:19:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64400 states. [2021-06-05 07:19:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64400 to 50619. [2021-06-05 07:19:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50619 states, 50618 states have (on average 3.878323916393378) internal successors, (196313), 50618 states have internal predecessors, (196313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50619 states to 50619 states and 196313 transitions. [2021-06-05 07:19:28,631 INFO L78 Accepts]: Start accepts. Automaton has 50619 states and 196313 transitions. Word has length 30 [2021-06-05 07:19:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:28,631 INFO L482 AbstractCegarLoop]: Abstraction has 50619 states and 196313 transitions. [2021-06-05 07:19:28,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) 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 07:19:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 50619 states and 196313 transitions. [2021-06-05 07:19:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:19:28,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:28,708 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:28,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:28,909 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1320998229, now seen corresponding path program 93 times [2021-06-05 07:19:28,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:28,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316553219] [2021-06-05 07:19:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:29,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:29,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316553219] [2021-06-05 07:19:29,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316553219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:29,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249134793] [2021-06-05 07:19:29,150 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:29,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:19:29,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:29,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:19:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:29,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:29,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:29,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:29,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:29,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:29,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:19:29,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 67 [2021-06-05 07:19:29,429 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 07:19:29,445 INFO L628 ElimStorePlain]: treesize reduction 19, result has 54.8 percent of original size [2021-06-05 07:19:29,447 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 07:19:29,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:35 [2021-06-05 07:19:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:29,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249134793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:29,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:19:29,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 07:19:29,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964699864] [2021-06-05 07:19:29,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:19:29,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:19:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:19:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:19:29,514 INFO L87 Difference]: Start difference. First operand 50619 states and 196313 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 07:19:30,342 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-06-05 07:19:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:19:32,690 INFO L93 Difference]: Finished difference Result 88005 states and 327696 transitions. [2021-06-05 07:19:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:19:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 07:19:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:19:33,111 INFO L225 Difference]: With dead ends: 88005 [2021-06-05 07:19:33,111 INFO L226 Difference]: Without dead ends: 87990 [2021-06-05 07:19:33,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 2238.3ms TimeCoverageRelationStatistics Valid=444, Invalid=3338, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:19:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87990 states. [2021-06-05 07:19:34,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87990 to 50624. [2021-06-05 07:19:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50624 states, 50623 states have (on average 3.878217411058215) internal successors, (196327), 50623 states have internal predecessors, (196327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:19:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50624 states to 50624 states and 196327 transitions. [2021-06-05 07:19:34,443 INFO L78 Accepts]: Start accepts. Automaton has 50624 states and 196327 transitions. Word has length 30 [2021-06-05 07:19:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:19:34,443 INFO L482 AbstractCegarLoop]: Abstraction has 50624 states and 196327 transitions. [2021-06-05 07:19:34,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 07:19:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 50624 states and 196327 transitions. [2021-06-05 07:19:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:19:34,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:19:34,519 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:19:34,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable787 [2021-06-05 07:19:34,719 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:19:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:19:34,720 INFO L82 PathProgramCache]: Analyzing trace with hash 241742567, now seen corresponding path program 207 times [2021-06-05 07:19:34,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:19:34,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102040157] [2021-06-05 07:19:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:19:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:19:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:19:34,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:19:34,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102040157] [2021-06-05 07:19:34,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102040157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:19:34,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954807064] [2021-06-05 07:19:34,857 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:19:34,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:19:34,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:19:34,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 07:19:34,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:19:35,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:19:35,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:19:35,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85