/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:37:48,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:37:48,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:37:48,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 23:37:48,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 23:37:48,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 23:37:48,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 23:37:48,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 23:37:48,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 23:37:48,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 23:37:48,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 23:37:48,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 23:37:48,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 23:37:48,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 23:37:48,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 23:37:48,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 23:37:48,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 23:37:48,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 23:37:48,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 23:37:48,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 23:37:48,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 23:37:48,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 23:37:48,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 23:37:48,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 23:37:48,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 23:37:48,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 23:37:48,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 23:37:48,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 23:37:48,107 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 [2021-03-10 23:37:48,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:37:48,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:37:48,134 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:37:48,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:37:48,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:37:48,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:37:48,137 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:37:48,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:37:48,137 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:37:48,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:37:48,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:37:48,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:37:48,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:37:48,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:37:48,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:37:48,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:37:48,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:37:48,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:37:48,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:37:48,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:37:48,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:37:48,139 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:37:48,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:37:48,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:37:48,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:37:48,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:37:48,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:37:48,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:37:48,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:37:48,140 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:37:48,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:37:48,140 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:37:48,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:37:48,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:37:48,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:37:48,376 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:37:48,377 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:37:48,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl [2021-03-10 23:37:48,378 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl' [2021-03-10 23:37:48,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:37:48,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:37:48,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:37:48,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:37:48,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:37:48,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/1) ... [2021-03-10 23:37:48,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/1) ... [2021-03-10 23:37:48,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:37:48,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:37:48,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:37:48,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:37:48,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/1) ... [2021-03-10 23:37:48,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/1) ... [2021-03-10 23:37:48,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/1) ... [2021-03-10 23:37:48,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/1) ... [2021-03-10 23:37:48,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/1) ... [2021-03-10 23:37:48,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/1) ... [2021-03-10 23:37:48,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/1) ... [2021-03-10 23:37:48,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:37:48,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:37:48,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:37:48,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:37:48,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (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 [2021-03-10 23:37:48,536 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:37:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:37:48,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:37:48,537 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:37:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:37:48,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:37:48,537 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:37:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:37:48,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:37:48,537 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 23:37:48,537 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 23:37:48,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 23:37:48,538 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:37:48,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:37:48,725 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 23:37:48,726 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:37:48 BoogieIcfgContainer [2021-03-10 23:37:48,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:37:48,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:37:48,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:37:48,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:37:48,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:37:48" (1/2) ... [2021-03-10 23:37:48,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1a5ac8 and model type array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:37:48, skipping insertion in model container [2021-03-10 23:37:48,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:37:48" (2/2) ... [2021-03-10 23:37:48,731 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum.wvr.bpl [2021-03-10 23:37:48,734 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:37:48,734 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:37:48,736 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:37:48,737 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:37:48,803 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 23:37:48,814 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 23:37:48,826 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:37:48,826 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:37:48,826 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:37:48,826 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:37:48,826 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:37:48,826 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:37:48,826 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:37:48,826 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:37:48,832 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-03-10 23:37:48,849 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:37:48,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:48,858 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:48,858 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:48,862 INFO L82 PathProgramCache]: Analyzing trace with hash -657586350, now seen corresponding path program 1 times [2021-03-10 23:37:48,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:48,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107308585] [2021-03-10 23:37:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:48,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107308585] [2021-03-10 23:37:48,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:37:48,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:37:48,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932860277] [2021-03-10 23:37:49,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:37:49,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:37:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:37:49,014 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:49,057 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-03-10 23:37:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:37:49,058 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 [2021-03-10 23:37:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:49,072 INFO L225 Difference]: With dead ends: 298 [2021-03-10 23:37:49,073 INFO L226 Difference]: Without dead ends: 283 [2021-03-10 23:37:49,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:37:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-03-10 23:37:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-03-10 23:37:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-03-10 23:37:49,131 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-03-10 23:37:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:49,134 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-03-10 23:37:49,134 INFO L481 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) [2021-03-10 23:37:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-03-10 23:37:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:37:49,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:49,136 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:49,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:37:49,137 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1687124317, now seen corresponding path program 1 times [2021-03-10 23:37:49,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:49,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892880973] [2021-03-10 23:37:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:37:49,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892880973] [2021-03-10 23:37:49,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:37:49,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:37:49,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363977550] [2021-03-10 23:37:49,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:37:49,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:49,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:37:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:37:49,184 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:49,212 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2021-03-10 23:37:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:37:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:37:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:49,214 INFO L225 Difference]: With dead ends: 249 [2021-03-10 23:37:49,214 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 23:37:49,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:37:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 23:37:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-03-10 23:37:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2021-03-10 23:37:49,225 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2021-03-10 23:37:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:49,226 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2021-03-10 23:37:49,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2021-03-10 23:37:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 23:37:49,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:49,227 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:49,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 23:37:49,227 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 636065525, now seen corresponding path program 1 times [2021-03-10 23:37:49,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:49,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632209488] [2021-03-10 23:37:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:37:49,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632209488] [2021-03-10 23:37:49,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:37:49,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:37:49,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784099931] [2021-03-10 23:37:49,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:37:49,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:49,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:37:49,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:37:49,263 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:49,321 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2021-03-10 23:37:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:37:49,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 23:37:49,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:49,323 INFO L225 Difference]: With dead ends: 332 [2021-03-10 23:37:49,324 INFO L226 Difference]: Without dead ends: 332 [2021-03-10 23:37:49,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:37:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-03-10 23:37:49,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2021-03-10 23:37:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2021-03-10 23:37:49,345 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2021-03-10 23:37:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:49,345 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2021-03-10 23:37:49,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:49,345 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2021-03-10 23:37:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:37:49,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:49,346 INFO L519 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] [2021-03-10 23:37:49,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 23:37:49,347 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash 31951364, now seen corresponding path program 1 times [2021-03-10 23:37:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:49,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321508558] [2021-03-10 23:37:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:49,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321508558] [2021-03-10 23:37:49,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492215790] [2021-03-10 23:37:49,702 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 [2021-03-10 23:37:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:49,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:37:49,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:50,011 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 28 treesize of output 22 [2021-03-10 23:37:50,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:50,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:50,023 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 23:37:50,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:50,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:7 [2021-03-10 23:37:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:50,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:50,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-10 23:37:50,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380714928] [2021-03-10 23:37:50,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:50,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:50,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:50,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:50,056 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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) [2021-03-10 23:37:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:50,395 INFO L93 Difference]: Finished difference Result 426 states and 1215 transitions. [2021-03-10 23:37:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:37:50,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 [2021-03-10 23:37:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:50,397 INFO L225 Difference]: With dead ends: 426 [2021-03-10 23:37:50,397 INFO L226 Difference]: Without dead ends: 411 [2021-03-10 23:37:50,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:37:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-03-10 23:37:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 346. [2021-03-10 23:37:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:50,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2021-03-10 23:37:50,407 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2021-03-10 23:37:50,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:50,407 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2021-03-10 23:37:50,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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) [2021-03-10 23:37:50,408 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2021-03-10 23:37:50,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:37:50,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:50,409 INFO L519 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] [2021-03-10 23:37:50,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:50,623 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash -267272986, now seen corresponding path program 2 times [2021-03-10 23:37:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:50,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545370237] [2021-03-10 23:37:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:50,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545370237] [2021-03-10 23:37:50,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852395498] [2021-03-10 23:37:50,944 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 [2021-03-10 23:37:50,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:50,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:50,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:37:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:51,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:51,144 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-03-10 23:37:51,159 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:51,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:51,171 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 [2021-03-10 23:37:51,174 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:51,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:51,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:37:51,195 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:21 [2021-03-10 23:37:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:51,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:51,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 23:37:51,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158157753] [2021-03-10 23:37:51,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:37:51,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:37:51,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:37:51,252 INFO L87 Difference]: Start difference. First operand 346 states and 999 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) [2021-03-10 23:37:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:52,011 INFO L93 Difference]: Finished difference Result 661 states and 1886 transitions. [2021-03-10 23:37:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:37:52,011 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 24 [2021-03-10 23:37:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:52,014 INFO L225 Difference]: With dead ends: 661 [2021-03-10 23:37:52,014 INFO L226 Difference]: Without dead ends: 631 [2021-03-10 23:37:52,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 821.4ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:37:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-03-10 23:37:52,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 362. [2021-03-10 23:37:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9224376731301938) internal successors, (1055), 361 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1055 transitions. [2021-03-10 23:37:52,024 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1055 transitions. Word has length 24 [2021-03-10 23:37:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:52,025 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1055 transitions. [2021-03-10 23:37:52,025 INFO L481 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) [2021-03-10 23:37:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1055 transitions. [2021-03-10 23:37:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:37:52,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:52,026 INFO L519 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] [2021-03-10 23:37:52,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:52,242 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:52,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1929910934, now seen corresponding path program 3 times [2021-03-10 23:37:52,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:52,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344271577] [2021-03-10 23:37:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:52,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344271577] [2021-03-10 23:37:52,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292923835] [2021-03-10 23:37:52,472 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 [2021-03-10 23:37:52,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:37:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:37:52,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:52,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:52,592 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 58 [2021-03-10 23:37:52,604 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:52,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:52,617 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 [2021-03-10 23:37:52,619 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:52,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:52,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:52,629 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:62, output treesize:26 [2021-03-10 23:37:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:52,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:52,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-03-10 23:37:52,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561466921] [2021-03-10 23:37:52,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:37:52,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:52,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:37:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:37:52,685 INFO L87 Difference]: Start difference. First operand 362 states and 1055 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-03-10 23:37:53,061 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-03-10 23:37:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:53,549 INFO L93 Difference]: Finished difference Result 732 states and 2129 transitions. [2021-03-10 23:37:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:37:53,550 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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 24 [2021-03-10 23:37:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:53,554 INFO L225 Difference]: With dead ends: 732 [2021-03-10 23:37:53,554 INFO L226 Difference]: Without dead ends: 717 [2021-03-10 23:37:53,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 817.2ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:37:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-03-10 23:37:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 366. [2021-03-10 23:37:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9342465753424656) internal successors, (1071), 365 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1071 transitions. [2021-03-10 23:37:53,564 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1071 transitions. Word has length 24 [2021-03-10 23:37:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:53,564 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1071 transitions. [2021-03-10 23:37:53,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) 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) [2021-03-10 23:37:53,565 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1071 transitions. [2021-03-10 23:37:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:37:53,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:53,566 INFO L519 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] [2021-03-10 23:37:53,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 23:37:53,784 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash 760908006, now seen corresponding path program 4 times [2021-03-10 23:37:53,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:53,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458075973] [2021-03-10 23:37:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:53,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458075973] [2021-03-10 23:37:53,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98700976] [2021-03-10 23:37:53,936 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 [2021-03-10 23:37:53,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:37:53,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:53,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:37:53,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:54,097 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 19 treesize of output 15 [2021-03-10 23:37:54,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:54,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:54,102 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 23:37:54,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:54,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2021-03-10 23:37:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:54,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:54,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-10 23:37:54,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691160190] [2021-03-10 23:37:54,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:37:54,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:54,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:37:54,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:37:54,130 INFO L87 Difference]: Start difference. First operand 366 states and 1071 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:54,322 INFO L93 Difference]: Finished difference Result 558 states and 1607 transitions. [2021-03-10 23:37:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:37:54,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:37:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:54,326 INFO L225 Difference]: With dead ends: 558 [2021-03-10 23:37:54,326 INFO L226 Difference]: Without dead ends: 543 [2021-03-10 23:37:54,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:37:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-03-10 23:37:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 382. [2021-03-10 23:37:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.916010498687664) internal successors, (1111), 381 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1111 transitions. [2021-03-10 23:37:54,337 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1111 transitions. Word has length 24 [2021-03-10 23:37:54,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:54,337 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1111 transitions. [2021-03-10 23:37:54,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1111 transitions. [2021-03-10 23:37:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:37:54,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:54,339 INFO L519 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] [2021-03-10 23:37:54,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:54,561 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1735055962, now seen corresponding path program 5 times [2021-03-10 23:37:54,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:54,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426233557] [2021-03-10 23:37:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:54,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426233557] [2021-03-10 23:37:54,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658211871] [2021-03-10 23:37:54,757 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:54,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:54,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 23:37:54,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:54,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:54,899 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 21 treesize of output 25 [2021-03-10 23:37:54,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:37:54,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:54,916 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 [2021-03-10 23:37:54,918 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:37:54,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:54,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:54,930 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:28 [2021-03-10 23:37:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:55,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:55,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 23:37:55,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805342070] [2021-03-10 23:37:55,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:37:55,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:55,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:37:55,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:37:55,005 INFO L87 Difference]: Start difference. First operand 382 states and 1111 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-03-10 23:37:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:55,399 INFO L93 Difference]: Finished difference Result 692 states and 2022 transitions. [2021-03-10 23:37:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:37:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 [2021-03-10 23:37:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:55,402 INFO L225 Difference]: With dead ends: 692 [2021-03-10 23:37:55,402 INFO L226 Difference]: Without dead ends: 677 [2021-03-10 23:37:55,403 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:37:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-03-10 23:37:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 390. [2021-03-10 23:37:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9383033419023135) internal successors, (1143), 389 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1143 transitions. [2021-03-10 23:37:55,412 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1143 transitions. Word has length 24 [2021-03-10 23:37:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:55,412 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1143 transitions. [2021-03-10 23:37:55,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-03-10 23:37:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1143 transitions. [2021-03-10 23:37:55,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:37:55,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:55,414 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:55,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 23:37:55,627 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1067448265, now seen corresponding path program 6 times [2021-03-10 23:37:55,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:55,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998072072] [2021-03-10 23:37:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:55,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998072072] [2021-03-10 23:37:55,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679343724] [2021-03-10 23:37:55,664 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 [2021-03-10 23:37:55,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:37:55,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:55,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:37:55,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:55,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:55,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:37:55,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852694237] [2021-03-10 23:37:55,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:37:55,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:55,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:37:55,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:37:55,767 INFO L87 Difference]: Start difference. First operand 390 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:56,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:56,133 INFO L93 Difference]: Finished difference Result 1186 states and 3456 transitions. [2021-03-10 23:37:56,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:37:56,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:37:56,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:56,137 INFO L225 Difference]: With dead ends: 1186 [2021-03-10 23:37:56,137 INFO L226 Difference]: Without dead ends: 1186 [2021-03-10 23:37:56,137 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:37:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-03-10 23:37:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 509. [2021-03-10 23:37:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.0688976377952755) internal successors, (1559), 508 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1559 transitions. [2021-03-10 23:37:56,150 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1559 transitions. Word has length 27 [2021-03-10 23:37:56,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:56,150 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 1559 transitions. [2021-03-10 23:37:56,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:56,150 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1559 transitions. [2021-03-10 23:37:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:37:56,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:56,151 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:56,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 23:37:56,364 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash -578927577, now seen corresponding path program 7 times [2021-03-10 23:37:56,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:56,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807444358] [2021-03-10 23:37:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:56,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807444358] [2021-03-10 23:37:56,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656391750] [2021-03-10 23:37:56,400 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 [2021-03-10 23:37:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:37:56,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:56,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:56,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:37:56,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807438565] [2021-03-10 23:37:56,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:37:56,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:56,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:37:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:37:56,533 INFO L87 Difference]: Start difference. First operand 509 states and 1559 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:57,307 INFO L93 Difference]: Finished difference Result 2025 states and 5753 transitions. [2021-03-10 23:37:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:37:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:37:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:57,320 INFO L225 Difference]: With dead ends: 2025 [2021-03-10 23:37:57,320 INFO L226 Difference]: Without dead ends: 2025 [2021-03-10 23:37:57,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:37:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-03-10 23:37:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 515. [2021-03-10 23:37:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.0914396887159534) internal successors, (1589), 514 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1589 transitions. [2021-03-10 23:37:57,342 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1589 transitions. Word has length 27 [2021-03-10 23:37:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:57,343 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1589 transitions. [2021-03-10 23:37:57,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:57,343 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1589 transitions. [2021-03-10 23:37:57,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:37:57,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:57,344 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:57,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:57,561 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:57,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:57,562 INFO L82 PathProgramCache]: Analyzing trace with hash -772828245, now seen corresponding path program 8 times [2021-03-10 23:37:57,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:57,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711800458] [2021-03-10 23:37:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:57,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711800458] [2021-03-10 23:37:57,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502800214] [2021-03-10 23:37:57,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:37:57,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:57,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:57,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:37:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:57,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:57,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:37:57,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755533895] [2021-03-10 23:37:57,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:37:57,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:57,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:37:57,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:37:57,731 INFO L87 Difference]: Start difference. First operand 515 states and 1589 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:58,382 INFO L93 Difference]: Finished difference Result 1842 states and 5297 transitions. [2021-03-10 23:37:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:37:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:37:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:58,389 INFO L225 Difference]: With dead ends: 1842 [2021-03-10 23:37:58,389 INFO L226 Difference]: Without dead ends: 1842 [2021-03-10 23:37:58,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:37:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-03-10 23:37:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 505. [2021-03-10 23:37:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.0734126984126986) internal successors, (1549), 504 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1549 transitions. [2021-03-10 23:37:58,405 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1549 transitions. Word has length 27 [2021-03-10 23:37:58,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:58,406 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 1549 transitions. [2021-03-10 23:37:58,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1549 transitions. [2021-03-10 23:37:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:37:58,407 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:58,407 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:58,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:58,624 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:58,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1094424712, now seen corresponding path program 1 times [2021-03-10 23:37:58,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:58,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918450702] [2021-03-10 23:37:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:37:58,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918450702] [2021-03-10 23:37:58,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168400563] [2021-03-10 23:37:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 23:37:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:37:58,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:37:58,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:58,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:37:58,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628184626] [2021-03-10 23:37:58,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:37:58,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:58,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:37:58,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:37:58,727 INFO L87 Difference]: Start difference. First operand 505 states and 1549 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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) [2021-03-10 23:37:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:58,836 INFO L93 Difference]: Finished difference Result 1215 states and 3591 transitions. [2021-03-10 23:37:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:37:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:37:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:58,840 INFO L225 Difference]: With dead ends: 1215 [2021-03-10 23:37:58,840 INFO L226 Difference]: Without dead ends: 1209 [2021-03-10 23:37:58,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:37:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-03-10 23:37:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 784. [2021-03-10 23:37:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.177522349936143) internal successors, (2488), 783 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2488 transitions. [2021-03-10 23:37:58,859 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2488 transitions. Word has length 27 [2021-03-10 23:37:58,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:58,859 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 2488 transitions. [2021-03-10 23:37:58,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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) [2021-03-10 23:37:58,859 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2488 transitions. [2021-03-10 23:37:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:37:58,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:58,860 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:59,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:59,076 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash -174473469, now seen corresponding path program 9 times [2021-03-10 23:37:59,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:59,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593322047] [2021-03-10 23:37:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:59,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593322047] [2021-03-10 23:37:59,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175412528] [2021-03-10 23:37:59,117 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 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 [2021-03-10 23:37:59,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:37:59,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:59,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:37:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:59,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:59,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:37:59,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252023080] [2021-03-10 23:37:59,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:37:59,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:59,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:37:59,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:37:59,225 INFO L87 Difference]: Start difference. First operand 784 states and 2488 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:59,402 INFO L93 Difference]: Finished difference Result 1375 states and 4197 transitions. [2021-03-10 23:37:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:37:59,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:37:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:59,407 INFO L225 Difference]: With dead ends: 1375 [2021-03-10 23:37:59,407 INFO L226 Difference]: Without dead ends: 1327 [2021-03-10 23:37:59,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:37:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-03-10 23:37:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 987. [2021-03-10 23:37:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.186612576064909) internal successors, (3142), 986 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3142 transitions. [2021-03-10 23:37:59,429 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3142 transitions. Word has length 27 [2021-03-10 23:37:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:59,429 INFO L480 AbstractCegarLoop]: Abstraction has 987 states and 3142 transitions. [2021-03-10 23:37:59,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3142 transitions. [2021-03-10 23:37:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:37:59,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:59,431 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:59,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:59,646 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:59,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:59,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2057199688, now seen corresponding path program 2 times [2021-03-10 23:37:59,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:59,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336087705] [2021-03-10 23:37:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:37:59,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336087705] [2021-03-10 23:37:59,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897800584] [2021-03-10 23:37:59,671 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 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 [2021-03-10 23:37:59,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:37:59,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:59,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:37:59,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:37:59,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:59,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:37:59,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837706818] [2021-03-10 23:37:59,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:37:59,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:59,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:37:59,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:37:59,772 INFO L87 Difference]: Start difference. First operand 987 states and 3142 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-03-10 23:37:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:59,878 INFO L93 Difference]: Finished difference Result 1478 states and 4418 transitions. [2021-03-10 23:37:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:37:59,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:37:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:59,883 INFO L225 Difference]: With dead ends: 1478 [2021-03-10 23:37:59,883 INFO L226 Difference]: Without dead ends: 1478 [2021-03-10 23:37:59,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:37:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-03-10 23:37:59,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2021-03-10 23:37:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.1502487562189057) internal successors, (3166), 1005 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3166 transitions. [2021-03-10 23:37:59,904 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3166 transitions. Word has length 27 [2021-03-10 23:37:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:59,904 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 3166 transitions. [2021-03-10 23:37:59,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-03-10 23:37:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3166 transitions. [2021-03-10 23:37:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:37:59,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:59,906 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:00,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 23:38:00,119 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1894890471, now seen corresponding path program 10 times [2021-03-10 23:38:00,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:00,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280023124] [2021-03-10 23:38:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:00,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280023124] [2021-03-10 23:38:00,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459256605] [2021-03-10 23:38:00,159 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 [2021-03-10 23:38:00,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:00,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:00,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:00,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:00,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:38:00,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23072083] [2021-03-10 23:38:00,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:38:00,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:00,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:38:00,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:38:00,258 INFO L87 Difference]: Start difference. First operand 1006 states and 3166 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) [2021-03-10 23:38:00,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:00,559 INFO L93 Difference]: Finished difference Result 2277 states and 6674 transitions. [2021-03-10 23:38:00,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:38:00,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:00,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:00,566 INFO L225 Difference]: With dead ends: 2277 [2021-03-10 23:38:00,566 INFO L226 Difference]: Without dead ends: 2277 [2021-03-10 23:38:00,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:38:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-03-10 23:38:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1022. [2021-03-10 23:38:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.147894221351616) internal successors, (3214), 1021 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3214 transitions. [2021-03-10 23:38:00,591 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3214 transitions. Word has length 27 [2021-03-10 23:38:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:00,592 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3214 transitions. [2021-03-10 23:38:00,592 INFO L481 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) [2021-03-10 23:38:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3214 transitions. [2021-03-10 23:38:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:00,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:00,594 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:00,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 23:38:00,804 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:00,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1982614843, now seen corresponding path program 11 times [2021-03-10 23:38:00,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:00,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553292018] [2021-03-10 23:38:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:00,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553292018] [2021-03-10 23:38:00,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262538771] [2021-03-10 23:38:00,835 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 [2021-03-10 23:38:00,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:38:00,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:00,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:00,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:00,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:38:00,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148472768] [2021-03-10 23:38:00,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:38:00,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:38:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:38:00,928 INFO L87 Difference]: Start difference. First operand 1022 states and 3214 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) [2021-03-10 23:38:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:01,382 INFO L93 Difference]: Finished difference Result 2725 states and 7832 transitions. [2021-03-10 23:38:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:38:01,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:01,391 INFO L225 Difference]: With dead ends: 2725 [2021-03-10 23:38:01,391 INFO L226 Difference]: Without dead ends: 2725 [2021-03-10 23:38:01,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:38:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-03-10 23:38:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1096. [2021-03-10 23:38:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.1406392694063925) internal successors, (3439), 1095 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3439 transitions. [2021-03-10 23:38:01,436 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3439 transitions. Word has length 27 [2021-03-10 23:38:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:01,436 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 3439 transitions. [2021-03-10 23:38:01,436 INFO L481 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) [2021-03-10 23:38:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3439 transitions. [2021-03-10 23:38:01,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:01,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:01,438 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:01,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 23:38:01,640 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:01,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1985022177, now seen corresponding path program 12 times [2021-03-10 23:38:01,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:01,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064931854] [2021-03-10 23:38:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:01,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064931854] [2021-03-10 23:38:01,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281951879] [2021-03-10 23:38:01,679 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 [2021-03-10 23:38:01,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 23:38:01,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:01,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:01,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:38:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861136923] [2021-03-10 23:38:01,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:01,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:01,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:01,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:01,786 INFO L87 Difference]: Start difference. First operand 1096 states and 3439 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:02,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:02,043 INFO L93 Difference]: Finished difference Result 2457 states and 7416 transitions. [2021-03-10 23:38:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:38:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:02,048 INFO L225 Difference]: With dead ends: 2457 [2021-03-10 23:38:02,049 INFO L226 Difference]: Without dead ends: 2447 [2021-03-10 23:38:02,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:38:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-03-10 23:38:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1570. [2021-03-10 23:38:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.1963033779477374) internal successors, (5015), 1569 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5015 transitions. [2021-03-10 23:38:02,078 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5015 transitions. Word has length 27 [2021-03-10 23:38:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:02,078 INFO L480 AbstractCegarLoop]: Abstraction has 1570 states and 5015 transitions. [2021-03-10 23:38:02,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5015 transitions. [2021-03-10 23:38:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:02,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:02,081 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:02,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:02,295 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:02,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1360647429, now seen corresponding path program 13 times [2021-03-10 23:38:02,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:02,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529413851] [2021-03-10 23:38:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:02,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529413851] [2021-03-10 23:38:02,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515700867] [2021-03-10 23:38:02,327 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 [2021-03-10 23:38:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:02,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:02,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:02,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:02,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:38:02,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451942050] [2021-03-10 23:38:02,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:02,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:02,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:02,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:02,434 INFO L87 Difference]: Start difference. First operand 1570 states and 5015 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:02,721 INFO L93 Difference]: Finished difference Result 2556 states and 7763 transitions. [2021-03-10 23:38:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:38:02,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:02,726 INFO L225 Difference]: With dead ends: 2556 [2021-03-10 23:38:02,727 INFO L226 Difference]: Without dead ends: 2556 [2021-03-10 23:38:02,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:38:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-03-10 23:38:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1576. [2021-03-10 23:38:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.1885714285714286) internal successors, (5022), 1575 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5022 transitions. [2021-03-10 23:38:02,755 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5022 transitions. Word has length 27 [2021-03-10 23:38:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:02,755 INFO L480 AbstractCegarLoop]: Abstraction has 1576 states and 5022 transitions. [2021-03-10 23:38:02,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5022 transitions. [2021-03-10 23:38:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:02,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:02,757 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:02,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 23:38:02,963 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:02,963 INFO L82 PathProgramCache]: Analyzing trace with hash 762421513, now seen corresponding path program 14 times [2021-03-10 23:38:02,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:02,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278246541] [2021-03-10 23:38:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:03,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278246541] [2021-03-10 23:38:03,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308070027] [2021-03-10 23:38:03,002 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 [2021-03-10 23:38:03,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:03,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:03,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:03,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:03,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:03,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:38:03,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040621537] [2021-03-10 23:38:03,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:38:03,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:03,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:38:03,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:38:03,081 INFO L87 Difference]: Start difference. First operand 1576 states and 5022 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) [2021-03-10 23:38:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:03,497 INFO L93 Difference]: Finished difference Result 3074 states and 9276 transitions. [2021-03-10 23:38:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:38:03,497 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:03,503 INFO L225 Difference]: With dead ends: 3074 [2021-03-10 23:38:03,503 INFO L226 Difference]: Without dead ends: 3070 [2021-03-10 23:38:03,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:38:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-03-10 23:38:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1588. [2021-03-10 23:38:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.178323881537492) internal successors, (5044), 1587 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5044 transitions. [2021-03-10 23:38:03,535 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5044 transitions. Word has length 27 [2021-03-10 23:38:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:03,535 INFO L480 AbstractCegarLoop]: Abstraction has 1588 states and 5044 transitions. [2021-03-10 23:38:03,535 INFO L481 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) [2021-03-10 23:38:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5044 transitions. [2021-03-10 23:38:03,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:03,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:03,537 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:03,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 23:38:03,751 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:03,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1467339831, now seen corresponding path program 15 times [2021-03-10 23:38:03,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:03,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039265228] [2021-03-10 23:38:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:03,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039265228] [2021-03-10 23:38:03,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744625402] [2021-03-10 23:38:03,783 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 [2021-03-10 23:38:03,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:38:03,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:03,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:03,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:03,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:03,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:03,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166148748] [2021-03-10 23:38:03,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:03,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:03,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:03,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:03,893 INFO L87 Difference]: Start difference. First operand 1588 states and 5044 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:04,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:04,665 INFO L93 Difference]: Finished difference Result 5541 states and 16712 transitions. [2021-03-10 23:38:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:38:04,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:04,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:04,677 INFO L225 Difference]: With dead ends: 5541 [2021-03-10 23:38:04,677 INFO L226 Difference]: Without dead ends: 5541 [2021-03-10 23:38:04,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:38:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-03-10 23:38:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 1799. [2021-03-10 23:38:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 3.274193548387097) internal successors, (5887), 1798 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5887 transitions. [2021-03-10 23:38:04,727 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5887 transitions. Word has length 27 [2021-03-10 23:38:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:04,727 INFO L480 AbstractCegarLoop]: Abstraction has 1799 states and 5887 transitions. [2021-03-10 23:38:04,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5887 transitions. [2021-03-10 23:38:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:04,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:04,730 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:04,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 23:38:04,943 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1661240499, now seen corresponding path program 16 times [2021-03-10 23:38:04,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:04,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642638810] [2021-03-10 23:38:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:04,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642638810] [2021-03-10 23:38:04,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010120525] [2021-03-10 23:38:04,981 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 [2021-03-10 23:38:05,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:05,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:05,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:05,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:05,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:05,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:05,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82684072] [2021-03-10 23:38:05,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:05,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:05,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:05,084 INFO L87 Difference]: Start difference. First operand 1799 states and 5887 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:05,784 INFO L93 Difference]: Finished difference Result 5525 states and 16688 transitions. [2021-03-10 23:38:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:38:05,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:05,795 INFO L225 Difference]: With dead ends: 5525 [2021-03-10 23:38:05,795 INFO L226 Difference]: Without dead ends: 5525 [2021-03-10 23:38:05,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:38:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-03-10 23:38:05,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 1784. [2021-03-10 23:38:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.259113853056646) internal successors, (5811), 1783 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5811 transitions. [2021-03-10 23:38:05,877 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5811 transitions. Word has length 27 [2021-03-10 23:38:05,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:05,877 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 5811 transitions. [2021-03-10 23:38:05,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:05,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5811 transitions. [2021-03-10 23:38:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:05,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:05,881 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:06,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:06,097 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:06,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2033150265, now seen corresponding path program 17 times [2021-03-10 23:38:06,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:06,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771042188] [2021-03-10 23:38:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:06,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771042188] [2021-03-10 23:38:06,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365243986] [2021-03-10 23:38:06,133 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 [2021-03-10 23:38:06,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:38:06,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:06,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:06,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:06,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:38:06,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099978928] [2021-03-10 23:38:06,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:38:06,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:06,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:38:06,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:38:06,230 INFO L87 Difference]: Start difference. First operand 1784 states and 5811 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) [2021-03-10 23:38:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:06,893 INFO L93 Difference]: Finished difference Result 5112 states and 15104 transitions. [2021-03-10 23:38:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:38:06,894 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 27 [2021-03-10 23:38:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:06,901 INFO L225 Difference]: With dead ends: 5112 [2021-03-10 23:38:06,901 INFO L226 Difference]: Without dead ends: 5112 [2021-03-10 23:38:06,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:38:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-03-10 23:38:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 1804. [2021-03-10 23:38:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.265113699389906) internal successors, (5887), 1803 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5887 transitions. [2021-03-10 23:38:06,950 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5887 transitions. Word has length 27 [2021-03-10 23:38:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:06,951 INFO L480 AbstractCegarLoop]: Abstraction has 1804 states and 5887 transitions. [2021-03-10 23:38:06,951 INFO L481 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) [2021-03-10 23:38:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5887 transitions. [2021-03-10 23:38:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:06,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:06,953 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:07,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:07,167 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:07,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:07,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2072598733, now seen corresponding path program 18 times [2021-03-10 23:38:07,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:07,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071559228] [2021-03-10 23:38:07,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:07,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071559228] [2021-03-10 23:38:07,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451415548] [2021-03-10 23:38:07,198 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 [2021-03-10 23:38:07,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:38:07,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:07,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:07,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:07,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:38:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468422702] [2021-03-10 23:38:07,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:38:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:38:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:38:07,292 INFO L87 Difference]: Start difference. First operand 1804 states and 5887 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) [2021-03-10 23:38:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:07,889 INFO L93 Difference]: Finished difference Result 4837 states and 14460 transitions. [2021-03-10 23:38:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:38:07,890 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 27 [2021-03-10 23:38:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:07,897 INFO L225 Difference]: With dead ends: 4837 [2021-03-10 23:38:07,897 INFO L226 Difference]: Without dead ends: 4833 [2021-03-10 23:38:07,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:38:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4833 states. [2021-03-10 23:38:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4833 to 1804. [2021-03-10 23:38:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2640044370493624) internal successors, (5885), 1803 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5885 transitions. [2021-03-10 23:38:07,938 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5885 transitions. Word has length 27 [2021-03-10 23:38:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:07,939 INFO L480 AbstractCegarLoop]: Abstraction has 1804 states and 5885 transitions. [2021-03-10 23:38:07,939 INFO L481 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) [2021-03-10 23:38:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5885 transitions. [2021-03-10 23:38:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:07,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:07,941 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:08,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-10 23:38:08,155 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash -832847347, now seen corresponding path program 19 times [2021-03-10 23:38:08,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:08,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436916373] [2021-03-10 23:38:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:08,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436916373] [2021-03-10 23:38:08,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180125653] [2021-03-10 23:38:08,184 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) [2021-03-10 23:38:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:08,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:08,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:08,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:08,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456151563] [2021-03-10 23:38:08,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:08,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:08,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:08,286 INFO L87 Difference]: Start difference. First operand 1804 states and 5885 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:08,968 INFO L93 Difference]: Finished difference Result 4879 states and 14554 transitions. [2021-03-10 23:38:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:38:08,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:08,975 INFO L225 Difference]: With dead ends: 4879 [2021-03-10 23:38:08,975 INFO L226 Difference]: Without dead ends: 4879 [2021-03-10 23:38:08,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:38:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-03-10 23:38:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 1814. [2021-03-10 23:38:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2675124103695534) internal successors, (5924), 1813 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5924 transitions. [2021-03-10 23:38:09,021 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5924 transitions. Word has length 27 [2021-03-10 23:38:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:09,021 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5924 transitions. [2021-03-10 23:38:09,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5924 transitions. [2021-03-10 23:38:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:09,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:09,023 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:09,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 23:38:09,239 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:09,239 INFO L82 PathProgramCache]: Analyzing trace with hash 949802123, now seen corresponding path program 20 times [2021-03-10 23:38:09,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:09,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458371908] [2021-03-10 23:38:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:09,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458371908] [2021-03-10 23:38:09,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967667028] [2021-03-10 23:38:09,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:38:09,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:09,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:09,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:09,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:09,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:09,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:09,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311369786] [2021-03-10 23:38:09,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:09,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:09,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:09,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:09,372 INFO L87 Difference]: Start difference. First operand 1814 states and 5924 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:10,041 INFO L93 Difference]: Finished difference Result 4586 states and 13852 transitions. [2021-03-10 23:38:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:38:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:10,049 INFO L225 Difference]: With dead ends: 4586 [2021-03-10 23:38:10,049 INFO L226 Difference]: Without dead ends: 4582 [2021-03-10 23:38:10,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:38:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-03-10 23:38:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 1814. [2021-03-10 23:38:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2664092664092665) internal successors, (5922), 1813 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:10,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5922 transitions. [2021-03-10 23:38:10,087 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5922 transitions. Word has length 27 [2021-03-10 23:38:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:10,088 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5922 transitions. [2021-03-10 23:38:10,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5922 transitions. [2021-03-10 23:38:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:10,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:10,090 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:10,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:10,306 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:10,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:10,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1965974026, now seen corresponding path program 3 times [2021-03-10 23:38:10,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:10,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075425242] [2021-03-10 23:38:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:38:10,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075425242] [2021-03-10 23:38:10,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101523737] [2021-03-10 23:38:10,328 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 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 [2021-03-10 23:38:10,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 23:38:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:10,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:38:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:38:10,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:10,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:38:10,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071590780] [2021-03-10 23:38:10,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:38:10,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:10,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:38:10,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:38:10,391 INFO L87 Difference]: Start difference. First operand 1814 states and 5922 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-03-10 23:38:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:10,477 INFO L93 Difference]: Finished difference Result 1973 states and 6380 transitions. [2021-03-10 23:38:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:38:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:10,482 INFO L225 Difference]: With dead ends: 1973 [2021-03-10 23:38:10,482 INFO L226 Difference]: Without dead ends: 1973 [2021-03-10 23:38:10,482 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:38:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-03-10 23:38:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1690. [2021-03-10 23:38:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 3.2634695085849614) internal successors, (5512), 1689 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 5512 transitions. [2021-03-10 23:38:10,513 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 5512 transitions. Word has length 27 [2021-03-10 23:38:10,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:10,513 INFO L480 AbstractCegarLoop]: Abstraction has 1690 states and 5512 transitions. [2021-03-10 23:38:10,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-03-10 23:38:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 5512 transitions. [2021-03-10 23:38:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:10,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:10,516 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:10,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 23:38:10,731 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:10,732 INFO L82 PathProgramCache]: Analyzing trace with hash 140920437, now seen corresponding path program 21 times [2021-03-10 23:38:10,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:10,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186038766] [2021-03-10 23:38:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:10,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186038766] [2021-03-10 23:38:10,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222083284] [2021-03-10 23:38:10,763 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 [2021-03-10 23:38:10,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:38:10,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:10,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:10,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:10,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:10,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 23:38:10,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566171802] [2021-03-10 23:38:10,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:38:10,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:10,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:38:10,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:38:10,846 INFO L87 Difference]: Start difference. First operand 1690 states and 5512 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:11,154 INFO L93 Difference]: Finished difference Result 3078 states and 9480 transitions. [2021-03-10 23:38:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:38:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:11,159 INFO L225 Difference]: With dead ends: 3078 [2021-03-10 23:38:11,159 INFO L226 Difference]: Without dead ends: 3078 [2021-03-10 23:38:11,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:38:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-03-10 23:38:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1814. [2021-03-10 23:38:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2465526751241036) internal successors, (5886), 1813 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5886 transitions. [2021-03-10 23:38:11,187 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5886 transitions. Word has length 27 [2021-03-10 23:38:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:11,187 INFO L480 AbstractCegarLoop]: Abstraction has 1814 states and 5886 transitions. [2021-03-10 23:38:11,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5886 transitions. [2021-03-10 23:38:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:11,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:11,190 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:11,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:11,403 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:11,403 INFO L82 PathProgramCache]: Analyzing trace with hash 793448345, now seen corresponding path program 22 times [2021-03-10 23:38:11,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:11,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103896850] [2021-03-10 23:38:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:11,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103896850] [2021-03-10 23:38:11,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310631975] [2021-03-10 23:38:11,432 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 [2021-03-10 23:38:11,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:11,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:11,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:11,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:11,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:11,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 23:38:11,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977434187] [2021-03-10 23:38:11,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:38:11,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:38:11,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:38:11,501 INFO L87 Difference]: Start difference. First operand 1814 states and 5886 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-03-10 23:38:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:11,766 INFO L93 Difference]: Finished difference Result 3165 states and 9710 transitions. [2021-03-10 23:38:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:38:11,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:11,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:11,770 INFO L225 Difference]: With dead ends: 3165 [2021-03-10 23:38:11,770 INFO L226 Difference]: Without dead ends: 3165 [2021-03-10 23:38:11,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:38:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-03-10 23:38:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1928. [2021-03-10 23:38:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2283341982355993) internal successors, (6221), 1927 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6221 transitions. [2021-03-10 23:38:11,798 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6221 transitions. Word has length 27 [2021-03-10 23:38:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:11,798 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 6221 transitions. [2021-03-10 23:38:11,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-03-10 23:38:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6221 transitions. [2021-03-10 23:38:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:11,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:11,801 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:12,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 23:38:12,011 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:12,011 INFO L82 PathProgramCache]: Analyzing trace with hash -756482595, now seen corresponding path program 23 times [2021-03-10 23:38:12,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:12,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753304323] [2021-03-10 23:38:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:38:12,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753304323] [2021-03-10 23:38:12,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228985406] [2021-03-10 23:38:12,040 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) [2021-03-10 23:38:12,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:38:12,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:12,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:12,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:38:12,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:12,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 23:38:12,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189142431] [2021-03-10 23:38:12,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:38:12,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:12,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:38:12,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:38:12,112 INFO L87 Difference]: Start difference. First operand 1928 states and 6221 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-03-10 23:38:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:12,323 INFO L93 Difference]: Finished difference Result 3029 states and 9362 transitions. [2021-03-10 23:38:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:38:12,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:12,328 INFO L225 Difference]: With dead ends: 3029 [2021-03-10 23:38:12,328 INFO L226 Difference]: Without dead ends: 3025 [2021-03-10 23:38:12,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:38:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-03-10 23:38:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 1928. [2021-03-10 23:38:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2272963155163468) internal successors, (6219), 1927 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6219 transitions. [2021-03-10 23:38:12,368 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6219 transitions. Word has length 27 [2021-03-10 23:38:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:12,368 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 6219 transitions. [2021-03-10 23:38:12,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 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) [2021-03-10 23:38:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6219 transitions. [2021-03-10 23:38:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:12,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:12,371 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:12,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 23:38:12,587 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:12,587 INFO L82 PathProgramCache]: Analyzing trace with hash 735522137, now seen corresponding path program 24 times [2021-03-10 23:38:12,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:12,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050116716] [2021-03-10 23:38:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:12,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050116716] [2021-03-10 23:38:12,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346312189] [2021-03-10 23:38:12,614 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 [2021-03-10 23:38:12,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:38:12,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:12,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:12,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:12,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:12,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 23:38:12,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093716159] [2021-03-10 23:38:12,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:38:12,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:12,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:38:12,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:38:12,686 INFO L87 Difference]: Start difference. First operand 1928 states and 6219 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:12,921 INFO L93 Difference]: Finished difference Result 3009 states and 9316 transitions. [2021-03-10 23:38:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:38:12,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:12,925 INFO L225 Difference]: With dead ends: 3009 [2021-03-10 23:38:12,925 INFO L226 Difference]: Without dead ends: 2993 [2021-03-10 23:38:12,925 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:38:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-03-10 23:38:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1936. [2021-03-10 23:38:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 3.221188630490956) internal successors, (6233), 1935 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 6233 transitions. [2021-03-10 23:38:12,950 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 6233 transitions. Word has length 27 [2021-03-10 23:38:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:12,950 INFO L480 AbstractCegarLoop]: Abstraction has 1936 states and 6233 transitions. [2021-03-10 23:38:12,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 6233 transitions. [2021-03-10 23:38:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:12,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:12,953 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:13,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 23:38:13,153 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:13,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1218264103, now seen corresponding path program 25 times [2021-03-10 23:38:13,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:13,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597695348] [2021-03-10 23:38:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:13,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597695348] [2021-03-10 23:38:13,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885841674] [2021-03-10 23:38:13,185 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 [2021-03-10 23:38:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:13,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:13,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:13,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:13,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50299556] [2021-03-10 23:38:13,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:13,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:13,281 INFO L87 Difference]: Start difference. First operand 1936 states and 6233 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:13,835 INFO L93 Difference]: Finished difference Result 5256 states and 16466 transitions. [2021-03-10 23:38:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:38:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:13,847 INFO L225 Difference]: With dead ends: 5256 [2021-03-10 23:38:13,847 INFO L226 Difference]: Without dead ends: 5256 [2021-03-10 23:38:13,848 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:38:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-03-10 23:38:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 2054. [2021-03-10 23:38:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.297613248904043) internal successors, (6770), 2053 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6770 transitions. [2021-03-10 23:38:13,883 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6770 transitions. Word has length 27 [2021-03-10 23:38:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:13,884 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 6770 transitions. [2021-03-10 23:38:13,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:13,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6770 transitions. [2021-03-10 23:38:13,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:13,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:13,886 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:14,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 23:38:14,091 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:14,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1412164771, now seen corresponding path program 26 times [2021-03-10 23:38:14,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:14,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298465141] [2021-03-10 23:38:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:14,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298465141] [2021-03-10 23:38:14,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900060389] [2021-03-10 23:38:14,119 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) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:14,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:14,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:14,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:14,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:14,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:14,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:14,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929804421] [2021-03-10 23:38:14,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:14,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:14,237 INFO L87 Difference]: Start difference. First operand 2054 states and 6770 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:14,721 INFO L93 Difference]: Finished difference Result 5169 states and 16251 transitions. [2021-03-10 23:38:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:38:14,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:14,728 INFO L225 Difference]: With dead ends: 5169 [2021-03-10 23:38:14,728 INFO L226 Difference]: Without dead ends: 5169 [2021-03-10 23:38:14,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:38:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2021-03-10 23:38:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 2051. [2021-03-10 23:38:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-03-10 23:38:14,763 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-03-10 23:38:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:14,763 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-03-10 23:38:14,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-03-10 23:38:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:14,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:14,766 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:14,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-10 23:38:14,967 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:14,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1784074537, now seen corresponding path program 27 times [2021-03-10 23:38:14,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:14,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190478050] [2021-03-10 23:38:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:14,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190478050] [2021-03-10 23:38:14,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709461051] [2021-03-10 23:38:14,997 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 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 [2021-03-10 23:38:15,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:38:15,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:15,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:15,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:15,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:15,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:38:15,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334288577] [2021-03-10 23:38:15,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:38:15,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:15,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:38:15,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:38:15,100 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 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) [2021-03-10 23:38:15,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:15,525 INFO L93 Difference]: Finished difference Result 4755 states and 14772 transitions. [2021-03-10 23:38:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:38:15,526 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 27 [2021-03-10 23:38:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:15,532 INFO L225 Difference]: With dead ends: 4755 [2021-03-10 23:38:15,532 INFO L226 Difference]: Without dead ends: 4755 [2021-03-10 23:38:15,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:38:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2021-03-10 23:38:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 2057. [2021-03-10 23:38:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-03-10 23:38:15,591 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-03-10 23:38:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:15,591 INFO L480 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-03-10 23:38:15,591 INFO L481 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) [2021-03-10 23:38:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-03-10 23:38:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:15,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:15,594 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:15,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:15,794 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1973292835, now seen corresponding path program 28 times [2021-03-10 23:38:15,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:15,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465885992] [2021-03-10 23:38:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:15,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465885992] [2021-03-10 23:38:15,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748181814] [2021-03-10 23:38:15,826 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 [2021-03-10 23:38:15,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:15,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:15,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:15,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:15,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:38:15,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502290146] [2021-03-10 23:38:15,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:38:15,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:38:15,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:38:15,906 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 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) [2021-03-10 23:38:16,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:16,283 INFO L93 Difference]: Finished difference Result 4606 states and 14402 transitions. [2021-03-10 23:38:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:38:16,283 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 27 [2021-03-10 23:38:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:16,289 INFO L225 Difference]: With dead ends: 4606 [2021-03-10 23:38:16,289 INFO L226 Difference]: Without dead ends: 4602 [2021-03-10 23:38:16,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:38:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2021-03-10 23:38:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 2051. [2021-03-10 23:38:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-03-10 23:38:16,324 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-03-10 23:38:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:16,324 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-03-10 23:38:16,324 INFO L481 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) [2021-03-10 23:38:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-03-10 23:38:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:16,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:16,327 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:16,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:16,528 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash -583771619, now seen corresponding path program 29 times [2021-03-10 23:38:16,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:16,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464735578] [2021-03-10 23:38:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:16,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464735578] [2021-03-10 23:38:16,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763303715] [2021-03-10 23:38:16,561 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) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:16,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:38:16,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:16,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:16,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:16,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:16,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068972348] [2021-03-10 23:38:16,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:16,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:16,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:16,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:16,660 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:17,067 INFO L93 Difference]: Finished difference Result 4605 states and 14373 transitions. [2021-03-10 23:38:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:38:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:17,074 INFO L225 Difference]: With dead ends: 4605 [2021-03-10 23:38:17,074 INFO L226 Difference]: Without dead ends: 4605 [2021-03-10 23:38:17,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:38:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-03-10 23:38:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2057. [2021-03-10 23:38:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-03-10 23:38:17,111 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-03-10 23:38:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:17,111 INFO L480 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-03-10 23:38:17,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-03-10 23:38:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:17,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:17,114 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:17,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 23:38:17,327 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:17,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1198877851, now seen corresponding path program 30 times [2021-03-10 23:38:17,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:17,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424471250] [2021-03-10 23:38:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:17,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424471250] [2021-03-10 23:38:17,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255017457] [2021-03-10 23:38:17,357 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 [2021-03-10 23:38:17,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:38:17,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:17,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:17,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:17,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993375419] [2021-03-10 23:38:17,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:17,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:17,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:17,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:17,475 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:17,856 INFO L93 Difference]: Finished difference Result 4532 states and 14195 transitions. [2021-03-10 23:38:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:38:17,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:17,862 INFO L225 Difference]: With dead ends: 4532 [2021-03-10 23:38:17,862 INFO L226 Difference]: Without dead ends: 4528 [2021-03-10 23:38:17,863 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:38:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-03-10 23:38:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 2051. [2021-03-10 23:38:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-03-10 23:38:17,897 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-03-10 23:38:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:17,897 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-03-10 23:38:17,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-03-10 23:38:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:17,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:17,900 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:18,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:18,110 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2052820965, now seen corresponding path program 31 times [2021-03-10 23:38:18,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:18,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517370407] [2021-03-10 23:38:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:18,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517370407] [2021-03-10 23:38:18,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374303200] [2021-03-10 23:38:18,138 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) [2021-03-10 23:38:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:18,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:18,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:18,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:18,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:38:18,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829694711] [2021-03-10 23:38:18,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:38:18,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:38:18,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:38:18,224 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 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) [2021-03-10 23:38:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:18,605 INFO L93 Difference]: Finished difference Result 4168 states and 12771 transitions. [2021-03-10 23:38:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:38:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:18,610 INFO L225 Difference]: With dead ends: 4168 [2021-03-10 23:38:18,610 INFO L226 Difference]: Without dead ends: 4168 [2021-03-10 23:38:18,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:38:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-03-10 23:38:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2247. [2021-03-10 23:38:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.2996438112199464) internal successors, (7411), 2246 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7411 transitions. [2021-03-10 23:38:18,645 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7411 transitions. Word has length 27 [2021-03-10 23:38:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:18,645 INFO L480 AbstractCegarLoop]: Abstraction has 2247 states and 7411 transitions. [2021-03-10 23:38:18,645 INFO L481 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) [2021-03-10 23:38:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7411 transitions. [2021-03-10 23:38:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:18,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:18,648 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:18,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 23:38:18,855 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:18,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2052928033, now seen corresponding path program 32 times [2021-03-10 23:38:18,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:18,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438425238] [2021-03-10 23:38:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:18,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438425238] [2021-03-10 23:38:18,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151545057] [2021-03-10 23:38:18,884 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 [2021-03-10 23:38:18,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:18,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:18,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:18,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:18,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:38:18,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851093547] [2021-03-10 23:38:18,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:38:18,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:38:18,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:38:18,957 INFO L87 Difference]: Start difference. First operand 2247 states and 7411 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) [2021-03-10 23:38:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:19,300 INFO L93 Difference]: Finished difference Result 3963 states and 12253 transitions. [2021-03-10 23:38:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:38:19,301 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:19,306 INFO L225 Difference]: With dead ends: 3963 [2021-03-10 23:38:19,306 INFO L226 Difference]: Without dead ends: 3959 [2021-03-10 23:38:19,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:38:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-03-10 23:38:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 2247. [2021-03-10 23:38:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.298753339269813) internal successors, (7409), 2246 states have internal predecessors, (7409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7409 transitions. [2021-03-10 23:38:19,340 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7409 transitions. Word has length 27 [2021-03-10 23:38:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:19,340 INFO L480 AbstractCegarLoop]: Abstraction has 2247 states and 7409 transitions. [2021-03-10 23:38:19,340 INFO L481 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) [2021-03-10 23:38:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7409 transitions. [2021-03-10 23:38:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:19,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:19,343 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:19,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:19,544 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:19,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1598657003, now seen corresponding path program 33 times [2021-03-10 23:38:19,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:19,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322954223] [2021-03-10 23:38:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:19,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322954223] [2021-03-10 23:38:19,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587380905] [2021-03-10 23:38:19,583 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 [2021-03-10 23:38:19,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:38:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:19,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:19,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:19,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 23:38:19,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975700929] [2021-03-10 23:38:19,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:38:19,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:19,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:38:19,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:38:19,655 INFO L87 Difference]: Start difference. First operand 2247 states and 7409 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) [2021-03-10 23:38:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:19,877 INFO L93 Difference]: Finished difference Result 3687 states and 11591 transitions. [2021-03-10 23:38:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:38:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:19,883 INFO L225 Difference]: With dead ends: 3687 [2021-03-10 23:38:19,883 INFO L226 Difference]: Without dead ends: 3671 [2021-03-10 23:38:19,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:38:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-03-10 23:38:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2247. [2021-03-10 23:38:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.296081923419412) internal successors, (7403), 2246 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7403 transitions. [2021-03-10 23:38:19,914 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7403 transitions. Word has length 27 [2021-03-10 23:38:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:19,914 INFO L480 AbstractCegarLoop]: Abstraction has 2247 states and 7403 transitions. [2021-03-10 23:38:19,914 INFO L481 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) [2021-03-10 23:38:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7403 transitions. [2021-03-10 23:38:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:19,917 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:19,917 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:20,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 23:38:20,118 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1286301031, now seen corresponding path program 34 times [2021-03-10 23:38:20,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:20,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771207487] [2021-03-10 23:38:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:20,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771207487] [2021-03-10 23:38:20,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669101492] [2021-03-10 23:38:20,152 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 [2021-03-10 23:38:20,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:20,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:20,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:20,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:20,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:20,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:20,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344497772] [2021-03-10 23:38:20,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:20,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:20,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:20,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:20,255 INFO L87 Difference]: Start difference. First operand 2247 states and 7403 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:20,624 INFO L93 Difference]: Finished difference Result 3798 states and 11861 transitions. [2021-03-10 23:38:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:38:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:20,630 INFO L225 Difference]: With dead ends: 3798 [2021-03-10 23:38:20,630 INFO L226 Difference]: Without dead ends: 3798 [2021-03-10 23:38:20,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:38:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-03-10 23:38:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2417. [2021-03-10 23:38:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.287251655629139) internal successors, (7942), 2416 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7942 transitions. [2021-03-10 23:38:20,677 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7942 transitions. Word has length 27 [2021-03-10 23:38:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:20,678 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7942 transitions. [2021-03-10 23:38:20,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7942 transitions. [2021-03-10 23:38:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:20,681 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:20,681 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:20,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 23:38:20,896 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash 496348439, now seen corresponding path program 35 times [2021-03-10 23:38:20,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:20,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148558590] [2021-03-10 23:38:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:20,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148558590] [2021-03-10 23:38:20,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858524889] [2021-03-10 23:38:20,926 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 [2021-03-10 23:38:20,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:38:20,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:20,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:21,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:21,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 23:38:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471956155] [2021-03-10 23:38:21,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:38:21,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:21,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:38:21,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:38:21,038 INFO L87 Difference]: Start difference. First operand 2417 states and 7942 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:21,393 INFO L93 Difference]: Finished difference Result 3765 states and 11785 transitions. [2021-03-10 23:38:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:38:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:21,399 INFO L225 Difference]: With dead ends: 3765 [2021-03-10 23:38:21,399 INFO L226 Difference]: Without dead ends: 3761 [2021-03-10 23:38:21,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:38:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-03-10 23:38:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2417. [2021-03-10 23:38:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2864238410596025) internal successors, (7940), 2416 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7940 transitions. [2021-03-10 23:38:21,434 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7940 transitions. Word has length 27 [2021-03-10 23:38:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:21,434 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7940 transitions. [2021-03-10 23:38:21,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:21,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7940 transitions. [2021-03-10 23:38:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:38:21,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:21,438 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:21,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 23:38:21,638 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash -348623013, now seen corresponding path program 36 times [2021-03-10 23:38:21,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:21,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565624056] [2021-03-10 23:38:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:21,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565624056] [2021-03-10 23:38:21,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224568505] [2021-03-10 23:38:21,671 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 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 [2021-03-10 23:38:21,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:38:21,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:21,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:38:21,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:21,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:21,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:38:21,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658184840] [2021-03-10 23:38:21,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:38:21,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:21,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:38:21,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:38:21,753 INFO L87 Difference]: Start difference. First operand 2417 states and 7940 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:21,947 INFO L93 Difference]: Finished difference Result 3553 states and 11291 transitions. [2021-03-10 23:38:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:38:21,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 23:38:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:21,952 INFO L225 Difference]: With dead ends: 3553 [2021-03-10 23:38:21,952 INFO L226 Difference]: Without dead ends: 3537 [2021-03-10 23:38:21,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:38:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-03-10 23:38:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2417. [2021-03-10 23:38:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2839403973509933) internal successors, (7934), 2416 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7934 transitions. [2021-03-10 23:38:21,985 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7934 transitions. Word has length 27 [2021-03-10 23:38:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:21,985 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 7934 transitions. [2021-03-10 23:38:21,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7934 transitions. [2021-03-10 23:38:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:21,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:21,989 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:22,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:22,194 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash 111827045, now seen corresponding path program 4 times [2021-03-10 23:38:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:22,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802304982] [2021-03-10 23:38:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:22,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802304982] [2021-03-10 23:38:22,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209114492] [2021-03-10 23:38:22,566 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 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 [2021-03-10 23:38:22,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:22,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:38:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:22,904 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 31 treesize of output 23 [2021-03-10 23:38:22,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:22,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:22,913 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 12 treesize of output 3 [2021-03-10 23:38:22,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:22,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,919 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:38:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:22,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:22,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:38:22,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751046191] [2021-03-10 23:38:22,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:38:22,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:38:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:38:22,938 INFO L87 Difference]: Start difference. First operand 2417 states and 7934 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:24,405 INFO L93 Difference]: Finished difference Result 3283 states and 10515 transitions. [2021-03-10 23:38:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:38:24,405 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:38:24,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:24,410 INFO L225 Difference]: With dead ends: 3283 [2021-03-10 23:38:24,410 INFO L226 Difference]: Without dead ends: 3268 [2021-03-10 23:38:24,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1416.2ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:38:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2021-03-10 23:38:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 2459. [2021-03-10 23:38:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 3.2782750203417415) internal successors, (8058), 2458 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 8058 transitions. [2021-03-10 23:38:24,440 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 8058 transitions. Word has length 30 [2021-03-10 23:38:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:24,440 INFO L480 AbstractCegarLoop]: Abstraction has 2459 states and 8058 transitions. [2021-03-10 23:38:24,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 8058 transitions. [2021-03-10 23:38:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:24,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:24,444 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:24,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:24,647 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1355546023, now seen corresponding path program 5 times [2021-03-10 23:38:24,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:24,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554902384] [2021-03-10 23:38:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:24,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554902384] [2021-03-10 23:38:24,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623703781] [2021-03-10 23:38:24,946 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 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 [2021-03-10 23:38:24,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:38:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:24,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:38:24,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:25,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:25,218 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 31 treesize of output 23 [2021-03-10 23:38:25,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:25,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:25,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:25,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-03-10 23:38:25,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:25,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:25,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:25,232 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:38:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:25,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:25,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 23:38:25,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017438121] [2021-03-10 23:38:25,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:38:25,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:25,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:38:25,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:38:25,253 INFO L87 Difference]: Start difference. First operand 2459 states and 8058 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:26,770 INFO L93 Difference]: Finished difference Result 3258 states and 10455 transitions. [2021-03-10 23:38:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:38:26,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:38:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:26,775 INFO L225 Difference]: With dead ends: 3258 [2021-03-10 23:38:26,775 INFO L226 Difference]: Without dead ends: 3243 [2021-03-10 23:38:26,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1348.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:38:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-03-10 23:38:26,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 2471. [2021-03-10 23:38:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 3.2753036437246963) internal successors, (8090), 2470 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 8090 transitions. [2021-03-10 23:38:26,805 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 8090 transitions. Word has length 30 [2021-03-10 23:38:26,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:26,805 INFO L480 AbstractCegarLoop]: Abstraction has 2471 states and 8090 transitions. [2021-03-10 23:38:26,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 8090 transitions. [2021-03-10 23:38:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:26,808 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:26,809 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:27,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 23:38:27,009 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1031778288, now seen corresponding path program 37 times [2021-03-10 23:38:27,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:27,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728967792] [2021-03-10 23:38:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:27,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728967792] [2021-03-10 23:38:27,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642255713] [2021-03-10 23:38:27,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:38:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:38:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:27,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:27,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:27,691 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 35 treesize of output 25 [2021-03-10 23:38:27,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:27,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:27,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:27,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:27,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:27,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-03-10 23:38:27,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:27,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:27,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:27,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:38:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:27,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:27,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:38:27,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761340665] [2021-03-10 23:38:27,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:38:27,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:27,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:38:27,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:38:27,726 INFO L87 Difference]: Start difference. First operand 2471 states and 8090 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:38:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:31,211 INFO L93 Difference]: Finished difference Result 3524 states and 11150 transitions. [2021-03-10 23:38:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:38:31,211 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-03-10 23:38:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:31,216 INFO L225 Difference]: With dead ends: 3524 [2021-03-10 23:38:31,216 INFO L226 Difference]: Without dead ends: 3498 [2021-03-10 23:38:31,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3033.3ms TimeCoverageRelationStatistics Valid=653, Invalid=4749, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:38:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-03-10 23:38:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 2550. [2021-03-10 23:38:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.26480972930561) internal successors, (8322), 2549 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8322 transitions. [2021-03-10 23:38:31,249 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8322 transitions. Word has length 30 [2021-03-10 23:38:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:31,249 INFO L480 AbstractCegarLoop]: Abstraction has 2550 states and 8322 transitions. [2021-03-10 23:38:31,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:38:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8322 transitions. [2021-03-10 23:38:31,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:31,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:31,252 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:31,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:31,454 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:31,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1220676491, now seen corresponding path program 6 times [2021-03-10 23:38:31,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:31,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434975964] [2021-03-10 23:38:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:31,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434975964] [2021-03-10 23:38:31,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855433004] [2021-03-10 23:38:31,797 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 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 [2021-03-10 23:38:31,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:38:31,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:31,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:38:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:31,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:31,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:31,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-03-10 23:38:31,978 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:38:31,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:31,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-03-10 23:38:31,994 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:32,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:32,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:32,001 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-03-10 23:38:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:32,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:32,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:38:32,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236205019] [2021-03-10 23:38:32,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:38:32,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:32,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:38:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:38:32,065 INFO L87 Difference]: Start difference. First operand 2550 states and 8322 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) [2021-03-10 23:38:34,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:34,957 INFO L93 Difference]: Finished difference Result 4233 states and 13327 transitions. [2021-03-10 23:38:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:38:34,958 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 [2021-03-10 23:38:34,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:34,964 INFO L225 Difference]: With dead ends: 4233 [2021-03-10 23:38:34,964 INFO L226 Difference]: Without dead ends: 4208 [2021-03-10 23:38:34,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2274.7ms TimeCoverageRelationStatistics Valid=481, Invalid=3425, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:38:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-03-10 23:38:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 2618. [2021-03-10 23:38:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 3.2777990064959877) internal successors, (8578), 2617 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 8578 transitions. [2021-03-10 23:38:35,016 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 8578 transitions. Word has length 30 [2021-03-10 23:38:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:35,016 INFO L480 AbstractCegarLoop]: Abstraction has 2618 states and 8578 transitions. [2021-03-10 23:38:35,016 INFO L481 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) [2021-03-10 23:38:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 8578 transitions. [2021-03-10 23:38:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:35,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:35,019 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:35,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:35,220 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1092571648, now seen corresponding path program 38 times [2021-03-10 23:38:35,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:35,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467822570] [2021-03-10 23:38:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:35,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467822570] [2021-03-10 23:38:35,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023287777] [2021-03-10 23:38:35,625 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 [2021-03-10 23:38:35,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:35,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:35,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:38:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:35,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:35,926 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 35 treesize of output 51 [2021-03-10 23:38:35,956 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:38:35,976 INFO L628 ElimStorePlain]: treesize reduction 52, result has 37.3 percent of original size [2021-03-10 23:38:35,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:35,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:35,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:38:35,981 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:35,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:35,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:35,990 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2021-03-10 23:38:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:36,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:36,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-03-10 23:38:36,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044310077] [2021-03-10 23:38:36,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:38:36,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:38:36,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:38:36,079 INFO L87 Difference]: Start difference. First operand 2618 states and 8578 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2021-03-10 23:38:39,643 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 23:38:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:41,035 INFO L93 Difference]: Finished difference Result 4242 states and 13238 transitions. [2021-03-10 23:38:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-10 23:38:41,036 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 [2021-03-10 23:38:41,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:41,042 INFO L225 Difference]: With dead ends: 4242 [2021-03-10 23:38:41,042 INFO L226 Difference]: Without dead ends: 4220 [2021-03-10 23:38:41,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 4055.6ms TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:38:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-03-10 23:38:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 2648. [2021-03-10 23:38:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 3.2795617680392897) internal successors, (8681), 2647 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 8681 transitions. [2021-03-10 23:38:41,077 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 8681 transitions. Word has length 30 [2021-03-10 23:38:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:41,077 INFO L480 AbstractCegarLoop]: Abstraction has 2648 states and 8681 transitions. [2021-03-10 23:38:41,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2021-03-10 23:38:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 8681 transitions. [2021-03-10 23:38:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:41,080 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:41,081 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:41,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 23:38:41,281 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash -604050960, now seen corresponding path program 39 times [2021-03-10 23:38:41,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:41,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567623764] [2021-03-10 23:38:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:41,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567623764] [2021-03-10 23:38:41,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297890121] [2021-03-10 23:38:41,720 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 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 [2021-03-10 23:38:41,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:38:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:41,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:38:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:42,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:42,202 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-03-10 23:38:42,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 102 [2021-03-10 23:38:42,208 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:42,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:42,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:42,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:42,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:42,228 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 17 treesize of output 9 [2021-03-10 23:38:42,230 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:42,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:42,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:42,243 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:134, output treesize:13 [2021-03-10 23:38:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:42,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:42,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-03-10 23:38:42,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390569540] [2021-03-10 23:38:42,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:38:42,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:38:42,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:38:42,304 INFO L87 Difference]: Start difference. First operand 2648 states and 8681 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:45,702 INFO L93 Difference]: Finished difference Result 4580 states and 14272 transitions. [2021-03-10 23:38:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:38:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:38:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:45,710 INFO L225 Difference]: With dead ends: 4580 [2021-03-10 23:38:45,710 INFO L226 Difference]: Without dead ends: 4550 [2021-03-10 23:38:45,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2847.0ms TimeCoverageRelationStatistics Valid=571, Invalid=4259, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 23:38:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4550 states. [2021-03-10 23:38:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4550 to 2789. [2021-03-10 23:38:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 3.2672166427546627) internal successors, (9109), 2788 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 9109 transitions. [2021-03-10 23:38:45,750 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 9109 transitions. Word has length 30 [2021-03-10 23:38:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:45,750 INFO L480 AbstractCegarLoop]: Abstraction has 2789 states and 9109 transitions. [2021-03-10 23:38:45,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 9109 transitions. [2021-03-10 23:38:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:45,754 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:45,754 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:45,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:45,954 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:45,954 INFO L82 PathProgramCache]: Analyzing trace with hash -850947931, now seen corresponding path program 7 times [2021-03-10 23:38:45,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:45,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140287644] [2021-03-10 23:38:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:46,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140287644] [2021-03-10 23:38:46,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460813978] [2021-03-10 23:38:46,283 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 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 [2021-03-10 23:38:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:46,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:38:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:46,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:46,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-03-10 23:38:46,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:46,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:46,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:46,633 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 12 treesize of output 3 [2021-03-10 23:38:46,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:46,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:46,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:46,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:38:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:46,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:46,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:38:46,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252024989] [2021-03-10 23:38:46,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:38:46,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:38:46,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:38:46,664 INFO L87 Difference]: Start difference. First operand 2789 states and 9109 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:48,040 INFO L93 Difference]: Finished difference Result 3556 states and 11429 transitions. [2021-03-10 23:38:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:38:48,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:38:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:48,046 INFO L225 Difference]: With dead ends: 3556 [2021-03-10 23:38:48,046 INFO L226 Difference]: Without dead ends: 3541 [2021-03-10 23:38:48,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1329.6ms TimeCoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:38:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-03-10 23:38:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2803. [2021-03-10 23:38:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 3.2658815132048535) internal successors, (9151), 2802 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 9151 transitions. [2021-03-10 23:38:48,103 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 9151 transitions. Word has length 30 [2021-03-10 23:38:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:48,103 INFO L480 AbstractCegarLoop]: Abstraction has 2803 states and 9151 transitions. [2021-03-10 23:38:48,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 9151 transitions. [2021-03-10 23:38:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:48,107 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:48,107 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:48,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 23:38:48,307 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1976646297, now seen corresponding path program 8 times [2021-03-10 23:38:48,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:48,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022115640] [2021-03-10 23:38:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:48,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022115640] [2021-03-10 23:38:48,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412998108] [2021-03-10 23:38:48,634 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 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 [2021-03-10 23:38:48,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:48,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:48,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:38:48,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:48,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:48,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:48,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:48,827 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 37 treesize of output 37 [2021-03-10 23:38:48,829 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:38:48,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:48,838 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 13 treesize of output 7 [2021-03-10 23:38:48,839 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:38:48,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:48,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:48,846 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-03-10 23:38:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:48,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:48,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:38:48,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818196932] [2021-03-10 23:38:48,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:38:48,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:48,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:38:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:38:48,913 INFO L87 Difference]: Start difference. First operand 2803 states and 9151 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) [2021-03-10 23:38:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:51,280 INFO L93 Difference]: Finished difference Result 4051 states and 12986 transitions. [2021-03-10 23:38:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:38:51,280 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 [2021-03-10 23:38:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:51,287 INFO L225 Difference]: With dead ends: 4051 [2021-03-10 23:38:51,288 INFO L226 Difference]: Without dead ends: 4026 [2021-03-10 23:38:51,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1920.1ms TimeCoverageRelationStatistics Valid=400, Invalid=2680, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:38:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-03-10 23:38:51,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2795. [2021-03-10 23:38:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 3.267716535433071) internal successors, (9130), 2794 states have internal predecessors, (9130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 9130 transitions. [2021-03-10 23:38:51,329 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 9130 transitions. Word has length 30 [2021-03-10 23:38:51,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:51,329 INFO L480 AbstractCegarLoop]: Abstraction has 2795 states and 9130 transitions. [2021-03-10 23:38:51,329 INFO L481 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) [2021-03-10 23:38:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 9130 transitions. [2021-03-10 23:38:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:51,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:51,332 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:51,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:51,533 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1936843459, now seen corresponding path program 9 times [2021-03-10 23:38:51,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:51,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622615530] [2021-03-10 23:38:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:51,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622615530] [2021-03-10 23:38:51,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838293135] [2021-03-10 23:38:51,861 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 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 [2021-03-10 23:38:51,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:38:51,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:51,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:38:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:52,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:52,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:52,174 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 31 treesize of output 23 [2021-03-10 23:38:52,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:52,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:52,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:52,181 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 12 treesize of output 3 [2021-03-10 23:38:52,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:52,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:52,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:52,187 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:38:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:52,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:52,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:38:52,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188994447] [2021-03-10 23:38:52,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:38:52,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:52,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:38:52,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:38:52,209 INFO L87 Difference]: Start difference. First operand 2795 states and 9130 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) [2021-03-10 23:38:53,043 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-03-10 23:38:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:54,312 INFO L93 Difference]: Finished difference Result 3546 states and 11382 transitions. [2021-03-10 23:38:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:38:54,312 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 [2021-03-10 23:38:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:54,317 INFO L225 Difference]: With dead ends: 3546 [2021-03-10 23:38:54,317 INFO L226 Difference]: Without dead ends: 3531 [2021-03-10 23:38:54,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1837.8ms TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:38:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-03-10 23:38:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 2798. [2021-03-10 23:38:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.2685019663925634) internal successors, (9142), 2797 states have internal predecessors, (9142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 9142 transitions. [2021-03-10 23:38:54,349 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 9142 transitions. Word has length 30 [2021-03-10 23:38:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:54,349 INFO L480 AbstractCegarLoop]: Abstraction has 2798 states and 9142 transitions. [2021-03-10 23:38:54,349 INFO L481 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) [2021-03-10 23:38:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 9142 transitions. [2021-03-10 23:38:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:54,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:54,352 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:54,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 23:38:54,554 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:54,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash 785065833, now seen corresponding path program 10 times [2021-03-10 23:38:54,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:54,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790379872] [2021-03-10 23:38:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790379872] [2021-03-10 23:38:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228287244] [2021-03-10 23:38:54,841 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 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 [2021-03-10 23:38:54,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:38:54,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:38:54,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:55,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:55,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:55,165 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 31 treesize of output 23 [2021-03-10 23:38:55,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:55,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:55,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:55,175 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 12 treesize of output 3 [2021-03-10 23:38:55,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:55,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:55,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:55,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:38:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:55,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:55,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:38:55,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887287143] [2021-03-10 23:38:55,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:38:55,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:55,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:38:55,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:38:55,204 INFO L87 Difference]: Start difference. First operand 2798 states and 9142 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:55,616 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-03-10 23:38:56,008 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-03-10 23:38:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:57,293 INFO L93 Difference]: Finished difference Result 3725 states and 11923 transitions. [2021-03-10 23:38:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:38:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:38:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:57,299 INFO L225 Difference]: With dead ends: 3725 [2021-03-10 23:38:57,299 INFO L226 Difference]: Without dead ends: 3710 [2021-03-10 23:38:57,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1802.9ms TimeCoverageRelationStatistics Valid=457, Invalid=1993, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:38:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2021-03-10 23:38:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 2807. [2021-03-10 23:38:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 3.270848182466144) internal successors, (9178), 2806 states have internal predecessors, (9178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 9178 transitions. [2021-03-10 23:38:57,334 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 9178 transitions. Word has length 30 [2021-03-10 23:38:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:57,334 INFO L480 AbstractCegarLoop]: Abstraction has 2807 states and 9178 transitions. [2021-03-10 23:38:57,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 9178 transitions. [2021-03-10 23:38:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:57,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:57,338 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:57,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 23:38:57,553 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash 203127111, now seen corresponding path program 11 times [2021-03-10 23:38:57,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:57,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707480275] [2021-03-10 23:38:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:57,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707480275] [2021-03-10 23:38:57,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305543631] [2021-03-10 23:38:57,947 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 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 [2021-03-10 23:38:57,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:38:57,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:57,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:38:57,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:58,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:58,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:58,171 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 46 treesize of output 34 [2021-03-10 23:38:58,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:58,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:58,180 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 23 treesize of output 7 [2021-03-10 23:38:58,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:58,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:58,187 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-03-10 23:38:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:58,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:58,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-03-10 23:38:58,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280638349] [2021-03-10 23:38:58,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:38:58,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:58,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:38:58,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:38:58,214 INFO L87 Difference]: Start difference. First operand 2807 states and 9178 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-03-10 23:38:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:59,406 INFO L93 Difference]: Finished difference Result 3680 states and 11820 transitions. [2021-03-10 23:38:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:38:59,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:38:59,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:59,413 INFO L225 Difference]: With dead ends: 3680 [2021-03-10 23:38:59,413 INFO L226 Difference]: Without dead ends: 3661 [2021-03-10 23:38:59,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1030.0ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:38:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-03-10 23:38:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2851. [2021-03-10 23:38:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 3.2712280701754386) internal successors, (9323), 2850 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-03-10 23:38:59,448 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-03-10 23:38:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:59,448 INFO L480 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-03-10 23:38:59,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-03-10 23:38:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-03-10 23:38:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:38:59,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:59,452 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:59,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 23:38:59,654 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:59,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:59,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1531644665, now seen corresponding path program 12 times [2021-03-10 23:38:59,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:59,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474910560] [2021-03-10 23:38:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:59,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474910560] [2021-03-10 23:38:59,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949535205] [2021-03-10 23:38:59,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:59,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:38:59,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:59,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:38:59,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:00,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:00,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-03-10 23:39:00,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:00,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:00,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:00,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2021-03-10 23:39:00,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:00,280 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-03-10 23:39:00,280 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 59 treesize of output 62 [2021-03-10 23:39:00,289 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:00,365 INFO L628 ElimStorePlain]: treesize reduction 38, result has 61.6 percent of original size [2021-03-10 23:39:00,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:00,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:44, output treesize:150 [2021-03-10 23:39:00,524 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:39:00,793 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-10 23:39:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:00,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:00,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:39:00,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817168346] [2021-03-10 23:39:00,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:39:00,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:39:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:39:00,963 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:01,258 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-03-10 23:39:01,730 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-03-10 23:39:02,041 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 48 [2021-03-10 23:39:02,331 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 23:39:02,785 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2021-03-10 23:39:03,067 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-03-10 23:39:03,266 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-03-10 23:39:03,684 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-03-10 23:39:03,831 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2021-03-10 23:39:04,068 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-03-10 23:39:04,535 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-03-10 23:39:04,783 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-03-10 23:39:05,283 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-03-10 23:39:05,702 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2021-03-10 23:39:06,243 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-03-10 23:39:06,708 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-03-10 23:39:06,900 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-03-10 23:39:07,506 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 23:39:07,883 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 23:39:08,077 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 23:39:08,253 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2021-03-10 23:39:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:08,301 INFO L93 Difference]: Finished difference Result 4576 states and 14508 transitions. [2021-03-10 23:39:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 23:39:08,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:08,308 INFO L225 Difference]: With dead ends: 4576 [2021-03-10 23:39:08,308 INFO L226 Difference]: Without dead ends: 4561 [2021-03-10 23:39:08,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 7116.9ms TimeCoverageRelationStatistics Valid=1190, Invalid=5782, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:39:08,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-03-10 23:39:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 2876. [2021-03-10 23:39:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2875 states have (on average 3.278608695652174) internal successors, (9426), 2875 states have internal predecessors, (9426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 9426 transitions. [2021-03-10 23:39:08,346 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 9426 transitions. Word has length 30 [2021-03-10 23:39:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:08,346 INFO L480 AbstractCegarLoop]: Abstraction has 2876 states and 9426 transitions. [2021-03-10 23:39:08,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 9426 transitions. [2021-03-10 23:39:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:08,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:08,349 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:08,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 23:39:08,550 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:08,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:08,550 INFO L82 PathProgramCache]: Analyzing trace with hash 140321278, now seen corresponding path program 40 times [2021-03-10 23:39:08,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:08,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546590730] [2021-03-10 23:39:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:09,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546590730] [2021-03-10 23:39:09,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567284480] [2021-03-10 23:39:09,015 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 [2021-03-10 23:39:09,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:39:09,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:09,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:39:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:09,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:09,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:09,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:09,308 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 35 treesize of output 25 [2021-03-10 23:39:09,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:09,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:09,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:09,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:09,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-03-10 23:39:09,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:09,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:09,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:09,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:39:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:09,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:09,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-03-10 23:39:09,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590180635] [2021-03-10 23:39:09,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:39:09,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:39:09,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:39:09,352 INFO L87 Difference]: Start difference. First operand 2876 states and 9426 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:10,347 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 23:39:11,488 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-03-10 23:39:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:13,060 INFO L93 Difference]: Finished difference Result 5666 states and 17654 transitions. [2021-03-10 23:39:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:39:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:13,070 INFO L225 Difference]: With dead ends: 5666 [2021-03-10 23:39:13,070 INFO L226 Difference]: Without dead ends: 5636 [2021-03-10 23:39:13,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 2978.2ms TimeCoverageRelationStatistics Valid=575, Invalid=3715, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:39:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-03-10 23:39:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 2948. [2021-03-10 23:39:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 3.2972514421445536) internal successors, (9717), 2947 states have internal predecessors, (9717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 9717 transitions. [2021-03-10 23:39:13,119 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 9717 transitions. Word has length 30 [2021-03-10 23:39:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:13,119 INFO L480 AbstractCegarLoop]: Abstraction has 2948 states and 9717 transitions. [2021-03-10 23:39:13,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 9717 transitions. [2021-03-10 23:39:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:13,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:13,123 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:13,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:13,324 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:13,324 INFO L82 PathProgramCache]: Analyzing trace with hash -143050448, now seen corresponding path program 41 times [2021-03-10 23:39:13,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:13,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725228110] [2021-03-10 23:39:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:13,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725228110] [2021-03-10 23:39:13,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188434149] [2021-03-10 23:39:13,828 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) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:13,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:39:13,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:13,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:39:13,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:14,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:14,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:14,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:14,185 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 35 treesize of output 51 [2021-03-10 23:39:14,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:39:14,217 INFO L628 ElimStorePlain]: treesize reduction 39, result has 46.6 percent of original size [2021-03-10 23:39:14,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:14,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:14,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:39:14,222 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:39:14,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:14,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:14,233 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:18 [2021-03-10 23:39:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:14,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:14,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-03-10 23:39:14,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709871529] [2021-03-10 23:39:14,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:39:14,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:39:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:39:14,340 INFO L87 Difference]: Start difference. First operand 2948 states and 9717 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:15,541 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-03-10 23:39:17,643 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-03-10 23:39:17,835 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-10 23:39:17,973 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-03-10 23:39:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:18,126 INFO L93 Difference]: Finished difference Result 5003 states and 15904 transitions. [2021-03-10 23:39:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:39:18,126 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:18,135 INFO L225 Difference]: With dead ends: 5003 [2021-03-10 23:39:18,135 INFO L226 Difference]: Without dead ends: 4973 [2021-03-10 23:39:18,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 3527.3ms TimeCoverageRelationStatistics Valid=594, Invalid=3828, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:39:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-03-10 23:39:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 2954. [2021-03-10 23:39:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.2996952251947174) internal successors, (9744), 2953 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9744 transitions. [2021-03-10 23:39:18,179 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9744 transitions. Word has length 30 [2021-03-10 23:39:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:18,179 INFO L480 AbstractCegarLoop]: Abstraction has 2954 states and 9744 transitions. [2021-03-10 23:39:18,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9744 transitions. [2021-03-10 23:39:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:18,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:18,182 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:18,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:18,383 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:18,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1630057388, now seen corresponding path program 42 times [2021-03-10 23:39:18,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:18,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234843001] [2021-03-10 23:39:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:18,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234843001] [2021-03-10 23:39:18,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736577551] [2021-03-10 23:39:18,835 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 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 [2021-03-10 23:39:18,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:39:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:39:18,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:19,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:19,099 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-03-10 23:39:19,099 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 175 treesize of output 161 [2021-03-10 23:39:19,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:19,129 INFO L628 ElimStorePlain]: treesize reduction 44, result has 41.3 percent of original size [2021-03-10 23:39:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:19,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:19,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:39:19,134 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:39:19,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:19,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:19,142 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:178, output treesize:15 [2021-03-10 23:39:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:19,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:19,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-03-10 23:39:19,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930059833] [2021-03-10 23:39:19,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:39:19,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:19,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:39:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:39:19,204 INFO L87 Difference]: Start difference. First operand 2954 states and 9744 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:19,614 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-10 23:39:19,814 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 23:39:20,538 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-10 23:39:20,667 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 23:39:20,890 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-03-10 23:39:21,295 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 23:39:21,485 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-03-10 23:39:21,646 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-03-10 23:39:22,356 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-03-10 23:39:22,640 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-03-10 23:39:22,999 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 23:39:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:24,602 INFO L93 Difference]: Finished difference Result 5907 states and 18501 transitions. [2021-03-10 23:39:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 23:39:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:24,613 INFO L225 Difference]: With dead ends: 5907 [2021-03-10 23:39:24,613 INFO L226 Difference]: Without dead ends: 5881 [2021-03-10 23:39:24,614 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 4670.8ms TimeCoverageRelationStatistics Valid=1099, Invalid=5873, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:39:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2021-03-10 23:39:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 2963. [2021-03-10 23:39:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 3.3018230925050642) internal successors, (9780), 2962 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 9780 transitions. [2021-03-10 23:39:24,666 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 9780 transitions. Word has length 30 [2021-03-10 23:39:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:24,666 INFO L480 AbstractCegarLoop]: Abstraction has 2963 states and 9780 transitions. [2021-03-10 23:39:24,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 9780 transitions. [2021-03-10 23:39:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:24,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:24,669 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:24,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 23:39:24,870 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash 399077000, now seen corresponding path program 43 times [2021-03-10 23:39:24,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:24,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143851988] [2021-03-10 23:39:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:25,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143851988] [2021-03-10 23:39:25,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705003046] [2021-03-10 23:39:25,361 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 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 [2021-03-10 23:39:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:25,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:39:25,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:25,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:25,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:25,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:25,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:25,651 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 35 treesize of output 25 [2021-03-10 23:39:25,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:25,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:25,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:25,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:25,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:25,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-03-10 23:39:25,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:25,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:25,669 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:39:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:25,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:25,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:39:25,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057300966] [2021-03-10 23:39:25,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:39:25,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:25,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:39:25,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:39:25,694 INFO L87 Difference]: Start difference. First operand 2963 states and 9780 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:39:27,767 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:39:29,480 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-03-10 23:39:30,334 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 23:39:30,871 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-03-10 23:39:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:31,574 INFO L93 Difference]: Finished difference Result 4207 states and 13375 transitions. [2021-03-10 23:39:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 23:39:31,575 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-03-10 23:39:31,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:31,582 INFO L225 Difference]: With dead ends: 4207 [2021-03-10 23:39:31,582 INFO L226 Difference]: Without dead ends: 4181 [2021-03-10 23:39:31,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 5038.2ms TimeCoverageRelationStatistics Valid=831, Invalid=6479, Unknown=0, NotChecked=0, Total=7310 [2021-03-10 23:39:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-03-10 23:39:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 2957. [2021-03-10 23:39:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2956 states have (on average 3.301420838971583) internal successors, (9759), 2956 states have internal predecessors, (9759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 9759 transitions. [2021-03-10 23:39:31,620 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 9759 transitions. Word has length 30 [2021-03-10 23:39:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:31,620 INFO L480 AbstractCegarLoop]: Abstraction has 2957 states and 9759 transitions. [2021-03-10 23:39:31,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:39:31,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 9759 transitions. [2021-03-10 23:39:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:31,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:31,624 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:31,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 23:39:31,836 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:31,836 INFO L82 PathProgramCache]: Analyzing trace with hash -709058241, now seen corresponding path program 13 times [2021-03-10 23:39:31,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:31,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784309842] [2021-03-10 23:39:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:32,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784309842] [2021-03-10 23:39:32,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203558570] [2021-03-10 23:39:32,213 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 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 [2021-03-10 23:39:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:32,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:39:32,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:32,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:32,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:32,490 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 31 treesize of output 39 [2021-03-10 23:39:32,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:32,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:32,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:32,530 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:39:32,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:32,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:32,557 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:39:32,558 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 28 [2021-03-10 23:39:32,560 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:32,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:32,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:39:32,587 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-03-10 23:39:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:32,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:32,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:39:32,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531748261] [2021-03-10 23:39:32,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:39:32,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:39:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:39:32,689 INFO L87 Difference]: Start difference. First operand 2957 states and 9759 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) 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) [2021-03-10 23:39:33,151 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-03-10 23:39:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:35,114 INFO L93 Difference]: Finished difference Result 4280 states and 13773 transitions. [2021-03-10 23:39:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:39:35,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 30 [2021-03-10 23:39:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:35,121 INFO L225 Difference]: With dead ends: 4280 [2021-03-10 23:39:35,121 INFO L226 Difference]: Without dead ends: 4265 [2021-03-10 23:39:35,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2101.2ms TimeCoverageRelationStatistics Valid=511, Invalid=2245, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:39:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4265 states. [2021-03-10 23:39:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4265 to 2948. [2021-03-10 23:39:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 3.2982694265354597) internal successors, (9720), 2947 states have internal predecessors, (9720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 9720 transitions. [2021-03-10 23:39:35,160 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 9720 transitions. Word has length 30 [2021-03-10 23:39:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:35,160 INFO L480 AbstractCegarLoop]: Abstraction has 2948 states and 9720 transitions. [2021-03-10 23:39:35,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) 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) [2021-03-10 23:39:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 9720 transitions. [2021-03-10 23:39:35,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:35,163 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:35,163 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:35,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 23:39:35,364 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:35,364 INFO L82 PathProgramCache]: Analyzing trace with hash -60532783, now seen corresponding path program 14 times [2021-03-10 23:39:35,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:35,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452266425] [2021-03-10 23:39:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:35,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452266425] [2021-03-10 23:39:35,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789036577] [2021-03-10 23:39:35,818 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 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 [2021-03-10 23:39:35,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:39:35,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:39:35,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:36,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:36,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:36,142 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 31 treesize of output 23 [2021-03-10 23:39:36,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:36,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:36,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:36,151 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 12 treesize of output 3 [2021-03-10 23:39:36,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:36,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:36,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:36,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:39:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:36,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:36,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:39:36,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881508920] [2021-03-10 23:39:36,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:39:36,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:36,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:39:36,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:39:36,184 INFO L87 Difference]: Start difference. First operand 2948 states and 9720 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:37,804 INFO L93 Difference]: Finished difference Result 3673 states and 11907 transitions. [2021-03-10 23:39:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:39:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:37,811 INFO L225 Difference]: With dead ends: 3673 [2021-03-10 23:39:37,811 INFO L226 Difference]: Without dead ends: 3658 [2021-03-10 23:39:37,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1633.5ms TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:39:37,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-03-10 23:39:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 2940. [2021-03-10 23:39:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.3001020755358965) internal successors, (9699), 2939 states have internal predecessors, (9699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9699 transitions. [2021-03-10 23:39:37,851 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9699 transitions. Word has length 30 [2021-03-10 23:39:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:37,851 INFO L480 AbstractCegarLoop]: Abstraction has 2940 states and 9699 transitions. [2021-03-10 23:39:37,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9699 transitions. [2021-03-10 23:39:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:37,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:37,855 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:38,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:38,055 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1633590787, now seen corresponding path program 15 times [2021-03-10 23:39:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:38,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677706486] [2021-03-10 23:39:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:38,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677706486] [2021-03-10 23:39:38,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181416518] [2021-03-10 23:39:38,538 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 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 [2021-03-10 23:39:38,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:39:38,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:39:38,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:38,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:38,866 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 31 treesize of output 23 [2021-03-10 23:39:38,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:38,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:38,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:38,878 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 12 treesize of output 3 [2021-03-10 23:39:38,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:38,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:38,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:38,886 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:39:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:38,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:38,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:39:38,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915723221] [2021-03-10 23:39:38,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:39:38,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:39:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:39:38,914 INFO L87 Difference]: Start difference. First operand 2940 states and 9699 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:40,254 INFO L93 Difference]: Finished difference Result 3838 states and 12411 transitions. [2021-03-10 23:39:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:39:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:40,262 INFO L225 Difference]: With dead ends: 3838 [2021-03-10 23:39:40,262 INFO L226 Difference]: Without dead ends: 3817 [2021-03-10 23:39:40,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1373.4ms TimeCoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:39:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-03-10 23:39:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 2932. [2021-03-10 23:39:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 3.2992152848857046) internal successors, (9670), 2931 states have internal predecessors, (9670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 9670 transitions. [2021-03-10 23:39:40,301 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 9670 transitions. Word has length 30 [2021-03-10 23:39:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:40,301 INFO L480 AbstractCegarLoop]: Abstraction has 2932 states and 9670 transitions. [2021-03-10 23:39:40,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 9670 transitions. [2021-03-10 23:39:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:40,305 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:40,305 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:40,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 23:39:40,523 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:40,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash -143854677, now seen corresponding path program 16 times [2021-03-10 23:39:40,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:40,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253254413] [2021-03-10 23:39:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:41,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253254413] [2021-03-10 23:39:41,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878129699] [2021-03-10 23:39:41,013 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 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 [2021-03-10 23:39:41,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:39:41,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:41,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:39:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:41,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:41,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:41,294 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 31 treesize of output 39 [2021-03-10 23:39:41,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:41,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:41,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:41,325 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 23:39:41,327 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:39:41,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:41,351 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:39:41,351 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 28 [2021-03-10 23:39:41,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:41,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:41,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:39:41,394 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:59 [2021-03-10 23:39:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:41,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:41,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:39:41,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047755849] [2021-03-10 23:39:41,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:39:41,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:41,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:39:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:39:41,513 INFO L87 Difference]: Start difference. First operand 2932 states and 9670 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:43,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:43,569 INFO L93 Difference]: Finished difference Result 4374 states and 14046 transitions. [2021-03-10 23:39:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:39:43,570 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:43,577 INFO L225 Difference]: With dead ends: 4374 [2021-03-10 23:39:43,577 INFO L226 Difference]: Without dead ends: 4349 [2021-03-10 23:39:43,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1823.9ms TimeCoverageRelationStatistics Valid=357, Invalid=1623, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:39:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-03-10 23:39:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 2926. [2021-03-10 23:39:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 3.296752136752137) internal successors, (9643), 2925 states have internal predecessors, (9643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 9643 transitions. [2021-03-10 23:39:43,620 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 9643 transitions. Word has length 30 [2021-03-10 23:39:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:43,620 INFO L480 AbstractCegarLoop]: Abstraction has 2926 states and 9643 transitions. [2021-03-10 23:39:43,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 9643 transitions. [2021-03-10 23:39:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:43,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:43,624 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:43,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 23:39:43,824 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash 217243089, now seen corresponding path program 17 times [2021-03-10 23:39:43,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:43,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373499720] [2021-03-10 23:39:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:44,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373499720] [2021-03-10 23:39:44,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632885146] [2021-03-10 23:39:44,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:44,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:39:44,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:44,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:39:44,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:44,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:44,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:44,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:44,632 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 45 treesize of output 41 [2021-03-10 23:39:44,635 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:39:44,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:44,646 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 [2021-03-10 23:39:44,648 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:39:44,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:44,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:44,658 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:17 [2021-03-10 23:39:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:44,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:44,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-03-10 23:39:44,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047627776] [2021-03-10 23:39:44,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:39:44,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:44,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:39:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:39:44,749 INFO L87 Difference]: Start difference. First operand 2926 states and 9643 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) [2021-03-10 23:39:48,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:48,095 INFO L93 Difference]: Finished difference Result 4622 states and 14840 transitions. [2021-03-10 23:39:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:39:48,096 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 [2021-03-10 23:39:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:48,106 INFO L225 Difference]: With dead ends: 4622 [2021-03-10 23:39:48,106 INFO L226 Difference]: Without dead ends: 4572 [2021-03-10 23:39:48,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2817.9ms TimeCoverageRelationStatistics Valid=490, Invalid=3670, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:39:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4572 states. [2021-03-10 23:39:48,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4572 to 2926. [2021-03-10 23:39:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 3.296752136752137) internal successors, (9643), 2925 states have internal predecessors, (9643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 9643 transitions. [2021-03-10 23:39:48,153 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 9643 transitions. Word has length 30 [2021-03-10 23:39:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:48,153 INFO L480 AbstractCegarLoop]: Abstraction has 2926 states and 9643 transitions. [2021-03-10 23:39:48,153 INFO L481 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) [2021-03-10 23:39:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 9643 transitions. [2021-03-10 23:39:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:48,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:48,157 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:48,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-03-10 23:39:48,360 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:48,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1050197787, now seen corresponding path program 18 times [2021-03-10 23:39:48,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:48,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70015104] [2021-03-10 23:39:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:48,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70015104] [2021-03-10 23:39:48,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125603963] [2021-03-10 23:39:48,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:39:48,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:39:48,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:39:48,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:49,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:49,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:49,177 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 31 treesize of output 23 [2021-03-10 23:39:49,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:49,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:49,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:49,187 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 12 treesize of output 3 [2021-03-10 23:39:49,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:49,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:49,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:49,194 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:39:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:49,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:49,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:39:49,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179337267] [2021-03-10 23:39:49,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:39:49,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:49,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:39:49,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:39:49,219 INFO L87 Difference]: Start difference. First operand 2926 states and 9643 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:51,441 INFO L93 Difference]: Finished difference Result 3897 states and 12594 transitions. [2021-03-10 23:39:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:39:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:51,449 INFO L225 Difference]: With dead ends: 3897 [2021-03-10 23:39:51,449 INFO L226 Difference]: Without dead ends: 3878 [2021-03-10 23:39:51,450 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1841.9ms TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:39:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-03-10 23:39:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2991. [2021-03-10 23:39:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.2989966555183945) internal successors, (9864), 2990 states have internal predecessors, (9864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 9864 transitions. [2021-03-10 23:39:51,491 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 9864 transitions. Word has length 30 [2021-03-10 23:39:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:51,491 INFO L480 AbstractCegarLoop]: Abstraction has 2991 states and 9864 transitions. [2021-03-10 23:39:51,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 9864 transitions. [2021-03-10 23:39:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:51,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:51,495 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:51,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:51,695 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1777396441, now seen corresponding path program 19 times [2021-03-10 23:39:51,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:51,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77931405] [2021-03-10 23:39:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:51,952 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 23:39:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:52,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77931405] [2021-03-10 23:39:52,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306443654] [2021-03-10 23:39:52,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:52,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:39:52,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:52,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:52,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:52,550 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 31 treesize of output 23 [2021-03-10 23:39:52,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:52,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:52,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:52,565 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 12 treesize of output 3 [2021-03-10 23:39:52,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:52,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:52,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:52,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:39:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:52,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:52,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-10 23:39:52,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946610976] [2021-03-10 23:39:52,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:39:52,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:39:52,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:39:52,605 INFO L87 Difference]: Start difference. First operand 2991 states and 9864 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) [2021-03-10 23:39:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:53,875 INFO L93 Difference]: Finished difference Result 3721 states and 12095 transitions. [2021-03-10 23:39:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:39:53,876 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 30 [2021-03-10 23:39:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:53,882 INFO L225 Difference]: With dead ends: 3721 [2021-03-10 23:39:53,883 INFO L226 Difference]: Without dead ends: 3706 [2021-03-10 23:39:53,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1328.0ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:39:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-03-10 23:39:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3006. [2021-03-10 23:39:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.2985024958402662) internal successors, (9912), 3005 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9912 transitions. [2021-03-10 23:39:53,921 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9912 transitions. Word has length 30 [2021-03-10 23:39:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:53,922 INFO L480 AbstractCegarLoop]: Abstraction has 3006 states and 9912 transitions. [2021-03-10 23:39:53,922 INFO L481 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) [2021-03-10 23:39:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9912 transitions. [2021-03-10 23:39:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:53,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:53,925 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:54,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 23:39:54,126 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:54,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1647572627, now seen corresponding path program 20 times [2021-03-10 23:39:54,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:54,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544241142] [2021-03-10 23:39:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:54,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544241142] [2021-03-10 23:39:54,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992206370] [2021-03-10 23:39:54,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:54,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:39:54,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:54,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:39:54,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:55,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:55,045 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 31 treesize of output 23 [2021-03-10 23:39:55,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:55,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:55,057 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 12 treesize of output 3 [2021-03-10 23:39:55,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:55,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:55,065 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:39:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:55,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:55,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:39:55,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102755661] [2021-03-10 23:39:55,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:39:55,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:55,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:39:55,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:39:55,101 INFO L87 Difference]: Start difference. First operand 3006 states and 9912 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:57,077 INFO L93 Difference]: Finished difference Result 3712 states and 12029 transitions. [2021-03-10 23:39:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:39:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:39:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:57,084 INFO L225 Difference]: With dead ends: 3712 [2021-03-10 23:39:57,085 INFO L226 Difference]: Without dead ends: 3697 [2021-03-10 23:39:57,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1815.3ms TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:39:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2021-03-10 23:39:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 3006. [2021-03-10 23:39:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.2985024958402662) internal successors, (9912), 3005 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9912 transitions. [2021-03-10 23:39:57,123 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9912 transitions. Word has length 30 [2021-03-10 23:39:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:57,123 INFO L480 AbstractCegarLoop]: Abstraction has 3006 states and 9912 transitions. [2021-03-10 23:39:57,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9912 transitions. [2021-03-10 23:39:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:39:57,127 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:57,127 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:57,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:57,328 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1074336665, now seen corresponding path program 21 times [2021-03-10 23:39:57,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:57,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869480697] [2021-03-10 23:39:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:57,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869480697] [2021-03-10 23:39:57,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932070406] [2021-03-10 23:39:57,728 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 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 [2021-03-10 23:39:57,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:39:57,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:57,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:39:57,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:58,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:58,064 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 31 treesize of output 47 [2021-03-10 23:39:58,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:39:58,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:58,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:58,132 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 34 treesize of output 42 [2021-03-10 23:39:58,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:39:58,180 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-03-10 23:39:58,180 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 57 treesize of output 60 [2021-03-10 23:39:58,191 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:58,272 INFO L628 ElimStorePlain]: treesize reduction 48, result has 58.3 percent of original size [2021-03-10 23:39:58,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:39:58,290 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:44, output treesize:109 [2021-03-10 23:39:58,436 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 23:39:58,617 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:39:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:58,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:58,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:39:58,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441265926] [2021-03-10 23:39:58,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:39:58,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:39:58,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:39:58,662 INFO L87 Difference]: Start difference. First operand 3006 states and 9912 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:59,785 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2021-03-10 23:39:59,949 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-03-10 23:40:00,284 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-03-10 23:40:00,607 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-03-10 23:40:02,028 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-03-10 23:40:02,403 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-03-10 23:40:03,265 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 23:40:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:03,417 INFO L93 Difference]: Finished difference Result 4183 states and 13392 transitions. [2021-03-10 23:40:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:40:03,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:03,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:03,425 INFO L225 Difference]: With dead ends: 4183 [2021-03-10 23:40:03,425 INFO L226 Difference]: Without dead ends: 4168 [2021-03-10 23:40:03,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 4208.2ms TimeCoverageRelationStatistics Valid=578, Invalid=3204, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:40:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-03-10 23:40:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 3006. [2021-03-10 23:40:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.2985024958402662) internal successors, (9912), 3005 states have internal predecessors, (9912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9912 transitions. [2021-03-10 23:40:03,467 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9912 transitions. Word has length 30 [2021-03-10 23:40:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:03,467 INFO L480 AbstractCegarLoop]: Abstraction has 3006 states and 9912 transitions. [2021-03-10 23:40:03,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9912 transitions. [2021-03-10 23:40:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:03,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:03,471 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:03,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 23:40:03,671 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:03,672 INFO L82 PathProgramCache]: Analyzing trace with hash -999533759, now seen corresponding path program 22 times [2021-03-10 23:40:03,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:03,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499722825] [2021-03-10 23:40:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:04,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499722825] [2021-03-10 23:40:04,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128240868] [2021-03-10 23:40:04,185 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 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 [2021-03-10 23:40:04,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:40:04,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:04,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:40:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:04,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:04,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:04,602 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 31 treesize of output 39 [2021-03-10 23:40:04,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:40:04,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:04,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:04,680 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:40:04,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 28 [2021-03-10 23:40:04,683 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:04,689 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:40:04,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:04,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:04,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:04,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:40:04,739 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-03-10 23:40:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:04,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:04,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:40:04,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552892552] [2021-03-10 23:40:04,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:40:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:04,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:40:04,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:40:04,868 INFO L87 Difference]: Start difference. First operand 3006 states and 9912 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) 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) [2021-03-10 23:40:05,469 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-10 23:40:06,092 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-03-10 23:40:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:08,311 INFO L93 Difference]: Finished difference Result 4482 states and 14350 transitions. [2021-03-10 23:40:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:40:08,312 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 30 [2021-03-10 23:40:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:08,320 INFO L225 Difference]: With dead ends: 4482 [2021-03-10 23:40:08,320 INFO L226 Difference]: Without dead ends: 4467 [2021-03-10 23:40:08,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3037.9ms TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:40:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2021-03-10 23:40:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3000. [2021-03-10 23:40:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2999 states have (on average 3.2960986995665222) internal successors, (9885), 2999 states have internal predecessors, (9885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 9885 transitions. [2021-03-10 23:40:08,365 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 9885 transitions. Word has length 30 [2021-03-10 23:40:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:08,365 INFO L480 AbstractCegarLoop]: Abstraction has 3000 states and 9885 transitions. [2021-03-10 23:40:08,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) 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) [2021-03-10 23:40:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 9885 transitions. [2021-03-10 23:40:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:08,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:08,369 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:08,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-03-10 23:40:08,569 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:08,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1105278713, now seen corresponding path program 23 times [2021-03-10 23:40:08,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:08,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010630461] [2021-03-10 23:40:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:09,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010630461] [2021-03-10 23:40:09,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251440287] [2021-03-10 23:40:09,091 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 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 [2021-03-10 23:40:09,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:40:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:09,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:40:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:09,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:09,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:09,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:09,368 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 37 treesize of output 37 [2021-03-10 23:40:09,371 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:40:09,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:09,385 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 13 treesize of output 7 [2021-03-10 23:40:09,388 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:09,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:09,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:09,399 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-03-10 23:40:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:09,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:09,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:40:09,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588767002] [2021-03-10 23:40:09,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:40:09,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:09,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:40:09,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:40:09,500 INFO L87 Difference]: Start difference. First operand 3000 states and 9885 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) [2021-03-10 23:40:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:12,718 INFO L93 Difference]: Finished difference Result 4461 states and 14434 transitions. [2021-03-10 23:40:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:40:12,719 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 [2021-03-10 23:40:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:12,728 INFO L225 Difference]: With dead ends: 4461 [2021-03-10 23:40:12,728 INFO L226 Difference]: Without dead ends: 4436 [2021-03-10 23:40:12,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2621.3ms TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:40:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-03-10 23:40:12,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 2997. [2021-03-10 23:40:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2996 states have (on average 3.2953938584779707) internal successors, (9873), 2996 states have internal predecessors, (9873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 9873 transitions. [2021-03-10 23:40:12,785 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 9873 transitions. Word has length 30 [2021-03-10 23:40:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:12,786 INFO L480 AbstractCegarLoop]: Abstraction has 2997 states and 9873 transitions. [2021-03-10 23:40:12,786 INFO L481 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) [2021-03-10 23:40:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 9873 transitions. [2021-03-10 23:40:12,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:12,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:12,790 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:12,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-03-10 23:40:12,990 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash -351008301, now seen corresponding path program 24 times [2021-03-10 23:40:12,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:12,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188983874] [2021-03-10 23:40:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:13,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188983874] [2021-03-10 23:40:13,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531508512] [2021-03-10 23:40:13,610 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 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 [2021-03-10 23:40:13,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:40:13,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:40:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:13,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:13,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:13,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-03-10 23:40:13,956 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:40:13,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:13,970 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 [2021-03-10 23:40:13,972 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:13,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:13,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:13,984 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-03-10 23:40:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:14,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:14,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:40:14,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28180527] [2021-03-10 23:40:14,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:40:14,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:14,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:40:14,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:40:14,061 INFO L87 Difference]: Start difference. First operand 2997 states and 9873 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:14,608 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:40:17,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:17,545 INFO L93 Difference]: Finished difference Result 4442 states and 14293 transitions. [2021-03-10 23:40:17,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:40:17,546 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:17,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:17,553 INFO L225 Difference]: With dead ends: 4442 [2021-03-10 23:40:17,554 INFO L226 Difference]: Without dead ends: 4402 [2021-03-10 23:40:17,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2623.1ms TimeCoverageRelationStatistics Valid=320, Invalid=2542, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:40:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2021-03-10 23:40:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 2964. [2021-03-10 23:40:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 2963 states have (on average 3.293958825514681) internal successors, (9760), 2963 states have internal predecessors, (9760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 9760 transitions. [2021-03-10 23:40:17,595 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 9760 transitions. Word has length 30 [2021-03-10 23:40:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:17,595 INFO L480 AbstractCegarLoop]: Abstraction has 2964 states and 9760 transitions. [2021-03-10 23:40:17,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 9760 transitions. [2021-03-10 23:40:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:17,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:17,599 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:17,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:17,799 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:17,800 INFO L82 PathProgramCache]: Analyzing trace with hash -529371137, now seen corresponding path program 25 times [2021-03-10 23:40:17,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:17,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058751721] [2021-03-10 23:40:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:18,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058751721] [2021-03-10 23:40:18,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920831485] [2021-03-10 23:40:18,371 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 [2021-03-10 23:40:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:18,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:40:18,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:18,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:18,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:18,687 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 31 treesize of output 39 [2021-03-10 23:40:18,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:40:18,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:18,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:18,749 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:40:18,749 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 28 [2021-03-10 23:40:18,752 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:18,755 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:40:18,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:18,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:18,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:18,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:40:18,797 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-03-10 23:40:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:18,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:18,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-10 23:40:18,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299514461] [2021-03-10 23:40:18,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:40:18,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:40:18,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:40:18,953 INFO L87 Difference]: Start difference. First operand 2964 states and 9760 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-03-10 23:40:19,343 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 23:40:19,938 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-10 23:40:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:21,238 INFO L93 Difference]: Finished difference Result 4741 states and 15190 transitions. [2021-03-10 23:40:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:40:21,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:21,247 INFO L225 Difference]: With dead ends: 4741 [2021-03-10 23:40:21,247 INFO L226 Difference]: Without dead ends: 4716 [2021-03-10 23:40:21,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2247.2ms TimeCoverageRelationStatistics Valid=341, Invalid=1551, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:40:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4716 states. [2021-03-10 23:40:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4716 to 3000. [2021-03-10 23:40:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2999 states have (on average 3.2974324774924977) internal successors, (9889), 2999 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 9889 transitions. [2021-03-10 23:40:21,290 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 9889 transitions. Word has length 30 [2021-03-10 23:40:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:21,290 INFO L480 AbstractCegarLoop]: Abstraction has 3000 states and 9889 transitions. [2021-03-10 23:40:21,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2021-03-10 23:40:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 9889 transitions. [2021-03-10 23:40:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:21,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:21,293 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:21,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:21,494 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:21,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1345440239, now seen corresponding path program 26 times [2021-03-10 23:40:21,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:21,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976527148] [2021-03-10 23:40:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:21,783 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 23:40:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:22,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976527148] [2021-03-10 23:40:22,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348083316] [2021-03-10 23:40:22,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:40:22,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:40:22,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:40:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:22,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:22,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-03-10 23:40:22,515 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:40:22,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:22,533 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 17 treesize of output 9 [2021-03-10 23:40:22,537 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:22,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:22,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:22,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-03-10 23:40:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:22,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:22,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:40:22,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724779283] [2021-03-10 23:40:22,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:40:22,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:40:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:40:22,686 INFO L87 Difference]: Start difference. First operand 3000 states and 9889 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:23,174 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 23:40:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:25,815 INFO L93 Difference]: Finished difference Result 4444 states and 14408 transitions. [2021-03-10 23:40:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:40:25,817 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:25,824 INFO L225 Difference]: With dead ends: 4444 [2021-03-10 23:40:25,825 INFO L226 Difference]: Without dead ends: 4394 [2021-03-10 23:40:25,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 2735.0ms TimeCoverageRelationStatistics Valid=424, Invalid=2768, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:40:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-03-10 23:40:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 3003. [2021-03-10 23:40:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.297135243171219) internal successors, (9898), 3002 states have internal predecessors, (9898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 9898 transitions. [2021-03-10 23:40:25,866 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 9898 transitions. Word has length 30 [2021-03-10 23:40:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:25,866 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 9898 transitions. [2021-03-10 23:40:25,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 9898 transitions. [2021-03-10 23:40:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:25,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:25,870 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:26,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 23:40:26,070 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:26,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:26,070 INFO L82 PathProgramCache]: Analyzing trace with hash 293462649, now seen corresponding path program 27 times [2021-03-10 23:40:26,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:26,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511204114] [2021-03-10 23:40:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:26,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511204114] [2021-03-10 23:40:26,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508866134] [2021-03-10 23:40:26,700 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 [2021-03-10 23:40:26,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:40:26,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:26,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 23:40:26,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:27,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:27,110 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 31 treesize of output 39 [2021-03-10 23:40:27,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:40:27,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:27,175 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:40:27,175 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 28 [2021-03-10 23:40:27,178 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:27,181 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:40:27,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:27,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:27,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:27,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:27,216 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:42, output treesize:36 [2021-03-10 23:40:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:27,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:27,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 25 [2021-03-10 23:40:27,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992423680] [2021-03-10 23:40:27,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:40:27,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:27,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:40:27,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:40:27,394 INFO L87 Difference]: Start difference. First operand 3003 states and 9898 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) [2021-03-10 23:40:30,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:30,365 INFO L93 Difference]: Finished difference Result 3832 states and 12398 transitions. [2021-03-10 23:40:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:40:30,367 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 [2021-03-10 23:40:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:30,373 INFO L225 Difference]: With dead ends: 3832 [2021-03-10 23:40:30,373 INFO L226 Difference]: Without dead ends: 3817 [2021-03-10 23:40:30,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2700.3ms TimeCoverageRelationStatistics Valid=306, Invalid=2346, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:40:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-03-10 23:40:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3012. [2021-03-10 23:40:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 3.2972434407173696) internal successors, (9928), 3011 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 9928 transitions. [2021-03-10 23:40:30,410 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 9928 transitions. Word has length 30 [2021-03-10 23:40:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:30,410 INFO L480 AbstractCegarLoop]: Abstraction has 3012 states and 9928 transitions. [2021-03-10 23:40:30,410 INFO L481 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) [2021-03-10 23:40:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 9928 transitions. [2021-03-10 23:40:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:30,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:30,414 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:30,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-03-10 23:40:30,619 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:30,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1279595355, now seen corresponding path program 28 times [2021-03-10 23:40:30,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:30,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228770957] [2021-03-10 23:40:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:31,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228770957] [2021-03-10 23:40:31,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927413266] [2021-03-10 23:40:31,225 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 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 [2021-03-10 23:40:31,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:40:31,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:31,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:40:31,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:31,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:31,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:31,718 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 31 treesize of output 23 [2021-03-10 23:40:31,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:31,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:31,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:31,735 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 12 treesize of output 3 [2021-03-10 23:40:31,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:31,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:31,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:31,746 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:40:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:31,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:31,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:40:31,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140141819] [2021-03-10 23:40:31,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:40:31,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:40:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:40:31,776 INFO L87 Difference]: Start difference. First operand 3012 states and 9928 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:32,659 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 23:40:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:34,125 INFO L93 Difference]: Finished difference Result 4064 states and 13103 transitions. [2021-03-10 23:40:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:40:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:34,133 INFO L225 Difference]: With dead ends: 4064 [2021-03-10 23:40:34,133 INFO L226 Difference]: Without dead ends: 4043 [2021-03-10 23:40:34,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 2186.1ms TimeCoverageRelationStatistics Valid=332, Invalid=1560, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:40:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2021-03-10 23:40:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 3075. [2021-03-10 23:40:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 3074 states have (on average 3.2989590110605076) internal successors, (10141), 3074 states have internal predecessors, (10141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 10141 transitions. [2021-03-10 23:40:34,174 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 10141 transitions. Word has length 30 [2021-03-10 23:40:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:34,174 INFO L480 AbstractCegarLoop]: Abstraction has 3075 states and 10141 transitions. [2021-03-10 23:40:34,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 10141 transitions. [2021-03-10 23:40:34,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:34,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:34,178 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:34,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 23:40:34,379 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:34,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1861534077, now seen corresponding path program 29 times [2021-03-10 23:40:34,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:34,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204907180] [2021-03-10 23:40:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:35,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204907180] [2021-03-10 23:40:35,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923856526] [2021-03-10 23:40:35,014 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 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 [2021-03-10 23:40:35,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:40:35,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:40:35,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:35,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:35,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:35,368 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 46 treesize of output 34 [2021-03-10 23:40:35,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:35,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:35,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:35,383 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 23 treesize of output 7 [2021-03-10 23:40:35,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:35,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:35,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:35,394 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-03-10 23:40:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:35,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:35,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-03-10 23:40:35,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617603419] [2021-03-10 23:40:35,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:40:35,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:35,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:40:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:40:35,437 INFO L87 Difference]: Start difference. First operand 3075 states and 10141 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-03-10 23:40:36,259 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:40:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:36,652 INFO L93 Difference]: Finished difference Result 3852 states and 12539 transitions. [2021-03-10 23:40:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:40:36,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:36,659 INFO L225 Difference]: With dead ends: 3852 [2021-03-10 23:40:36,659 INFO L226 Difference]: Without dead ends: 3833 [2021-03-10 23:40:36,659 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1294.1ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:40:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-03-10 23:40:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3087. [2021-03-10 23:40:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 3086 states have (on average 3.3036292935839273) internal successors, (10195), 3086 states have internal predecessors, (10195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 10195 transitions. [2021-03-10 23:40:36,695 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 10195 transitions. Word has length 30 [2021-03-10 23:40:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:36,695 INFO L480 AbstractCegarLoop]: Abstraction has 3087 states and 10195 transitions. [2021-03-10 23:40:36,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2021-03-10 23:40:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 10195 transitions. [2021-03-10 23:40:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:36,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:36,698 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:36,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-03-10 23:40:36,899 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash 698661443, now seen corresponding path program 30 times [2021-03-10 23:40:36,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:36,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133880689] [2021-03-10 23:40:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:37,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133880689] [2021-03-10 23:40:37,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021446639] [2021-03-10 23:40:37,439 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 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 [2021-03-10 23:40:37,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:40:37,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:37,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 23:40:37,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:37,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:37,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:37,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:37,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:37,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:37,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-03-10 23:40:37,868 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:40:37,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:37,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:37,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:37,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:40:37,893 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:37,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:37,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:37,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:25 [2021-03-10 23:40:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:38,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:38,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-03-10 23:40:38,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582090467] [2021-03-10 23:40:38,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:40:38,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:38,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:40:38,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:40:38,040 INFO L87 Difference]: Start difference. First operand 3087 states and 10195 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:41,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:41,225 INFO L93 Difference]: Finished difference Result 5046 states and 15976 transitions. [2021-03-10 23:40:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:40:41,226 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:41,234 INFO L225 Difference]: With dead ends: 5046 [2021-03-10 23:40:41,234 INFO L226 Difference]: Without dead ends: 4991 [2021-03-10 23:40:41,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 2608.8ms TimeCoverageRelationStatistics Valid=492, Invalid=2264, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:40:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-03-10 23:40:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 3146. [2021-03-10 23:40:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 3145 states have (on average 3.305564387917329) internal successors, (10396), 3145 states have internal predecessors, (10396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 10396 transitions. [2021-03-10 23:40:41,280 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 10396 transitions. Word has length 30 [2021-03-10 23:40:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:41,280 INFO L480 AbstractCegarLoop]: Abstraction has 3146 states and 10396 transitions. [2021-03-10 23:40:41,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 10396 transitions. [2021-03-10 23:40:41,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:41,284 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:41,284 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:41,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:41,484 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:41,485 INFO L82 PathProgramCache]: Analyzing trace with hash -801833895, now seen corresponding path program 31 times [2021-03-10 23:40:41,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:41,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144988252] [2021-03-10 23:40:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:42,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144988252] [2021-03-10 23:40:42,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343403473] [2021-03-10 23:40:42,129 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 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 [2021-03-10 23:40:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:42,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:40:42,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:42,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:42,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:42,485 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 31 treesize of output 39 [2021-03-10 23:40:42,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:40:42,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:42,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:42,553 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:40:42,553 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 28 [2021-03-10 23:40:42,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:42,558 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 23:40:42,561 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:42,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:42,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:42,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:40:42,611 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:59 [2021-03-10 23:40:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:42,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:42,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:40:42,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009535922] [2021-03-10 23:40:42,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:40:42,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:42,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:40:42,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:40:42,760 INFO L87 Difference]: Start difference. First operand 3146 states and 10396 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:43,172 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 23:40:43,765 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 23:40:43,968 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-03-10 23:40:45,529 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-10 23:40:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:45,741 INFO L93 Difference]: Finished difference Result 4910 states and 15768 transitions. [2021-03-10 23:40:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:40:45,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:45,750 INFO L225 Difference]: With dead ends: 4910 [2021-03-10 23:40:45,751 INFO L226 Difference]: Without dead ends: 4870 [2021-03-10 23:40:45,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 2856.2ms TimeCoverageRelationStatistics Valid=491, Invalid=1959, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:40:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2021-03-10 23:40:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 3117. [2021-03-10 23:40:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 3.298780487804878) internal successors, (10279), 3116 states have internal predecessors, (10279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 10279 transitions. [2021-03-10 23:40:45,797 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 10279 transitions. Word has length 30 [2021-03-10 23:40:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:45,797 INFO L480 AbstractCegarLoop]: Abstraction has 3117 states and 10279 transitions. [2021-03-10 23:40:45,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 10279 transitions. [2021-03-10 23:40:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:45,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:45,800 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:46,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 23:40:46,001 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1059759209, now seen corresponding path program 32 times [2021-03-10 23:40:46,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:46,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124425684] [2021-03-10 23:40:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:46,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124425684] [2021-03-10 23:40:46,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121574814] [2021-03-10 23:40:46,735 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 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 [2021-03-10 23:40:46,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:40:46,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:40:46,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:47,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:47,105 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 45 treesize of output 41 [2021-03-10 23:40:47,108 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:40:47,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:47,123 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 [2021-03-10 23:40:47,126 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:47,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:47,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:47,141 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:17 [2021-03-10 23:40:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:47,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:47,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-03-10 23:40:47,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561537873] [2021-03-10 23:40:47,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:40:47,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:47,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:40:47,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:40:47,241 INFO L87 Difference]: Start difference. First operand 3117 states and 10279 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) [2021-03-10 23:40:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:50,861 INFO L93 Difference]: Finished difference Result 4853 states and 15584 transitions. [2021-03-10 23:40:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:40:50,862 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 [2021-03-10 23:40:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:50,870 INFO L225 Difference]: With dead ends: 4853 [2021-03-10 23:40:50,870 INFO L226 Difference]: Without dead ends: 4803 [2021-03-10 23:40:50,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 3151.1ms TimeCoverageRelationStatistics Valid=467, Invalid=2955, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:40:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-03-10 23:40:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3128. [2021-03-10 23:40:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 3.295490885833067) internal successors, (10305), 3127 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 10305 transitions. [2021-03-10 23:40:50,916 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 10305 transitions. Word has length 30 [2021-03-10 23:40:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:50,917 INFO L480 AbstractCegarLoop]: Abstraction has 3128 states and 10305 transitions. [2021-03-10 23:40:50,917 INFO L481 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) [2021-03-10 23:40:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 10305 transitions. [2021-03-10 23:40:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:50,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:50,921 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:51,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:51,122 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:51,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:51,122 INFO L82 PathProgramCache]: Analyzing trace with hash 863310147, now seen corresponding path program 33 times [2021-03-10 23:40:51,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:51,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675243293] [2021-03-10 23:40:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:51,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675243293] [2021-03-10 23:40:51,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595680530] [2021-03-10 23:40:51,828 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 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 [2021-03-10 23:40:51,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:40:51,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:51,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 23:40:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:52,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:52,458 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 31 treesize of output 39 [2021-03-10 23:40:52,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:40:52,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:52,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:52,507 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 23:40:52,511 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:40:52,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:52,549 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:40:52,550 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 28 [2021-03-10 23:40:52,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:52,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:52,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:52,604 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:45, output treesize:92 [2021-03-10 23:40:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:52,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:52,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-03-10 23:40:52,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986409460] [2021-03-10 23:40:52,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:40:52,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:52,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:40:52,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:40:52,904 INFO L87 Difference]: Start difference. First operand 3128 states and 10305 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:55,872 INFO L93 Difference]: Finished difference Result 3552 states and 11482 transitions. [2021-03-10 23:40:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:40:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:40:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:55,879 INFO L225 Difference]: With dead ends: 3552 [2021-03-10 23:40:55,879 INFO L226 Difference]: Without dead ends: 3518 [2021-03-10 23:40:55,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2793.0ms TimeCoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:40:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3518 states. [2021-03-10 23:40:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3518 to 3159. [2021-03-10 23:40:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 3.292273590880304) internal successors, (10397), 3158 states have internal predecessors, (10397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 10397 transitions. [2021-03-10 23:40:55,915 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 10397 transitions. Word has length 30 [2021-03-10 23:40:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:55,915 INFO L480 AbstractCegarLoop]: Abstraction has 3159 states and 10397 transitions. [2021-03-10 23:40:55,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 10397 transitions. [2021-03-10 23:40:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:40:55,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:55,919 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:56,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-10 23:40:56,120 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:56,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1632653821, now seen corresponding path program 34 times [2021-03-10 23:40:56,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:56,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353945217] [2021-03-10 23:40:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:56,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353945217] [2021-03-10 23:40:56,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655835353] [2021-03-10 23:40:56,861 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 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 [2021-03-10 23:40:56,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:40:56,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:56,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:40:56,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:57,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:57,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:57,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-03-10 23:40:57,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:40:57,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:57,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:57,272 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:40:57,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:57,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:57,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:57,313 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:40:57,313 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 28 [2021-03-10 23:40:57,316 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:57,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:57,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:57,353 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:44 [2021-03-10 23:40:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:57,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:57,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-03-10 23:40:57,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941742719] [2021-03-10 23:40:57,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:40:57,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:40:57,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:40:57,595 INFO L87 Difference]: Start difference. First operand 3159 states and 10397 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:57,786 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2021-03-10 23:40:58,038 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-10 23:40:58,269 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2021-03-10 23:40:58,490 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-10 23:40:58,710 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:40:58,878 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-03-10 23:40:59,050 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-10 23:41:00,259 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-10 23:41:01,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:01,261 INFO L93 Difference]: Finished difference Result 4568 states and 14746 transitions. [2021-03-10 23:41:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:41:01,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:41:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:01,269 INFO L225 Difference]: With dead ends: 4568 [2021-03-10 23:41:01,269 INFO L226 Difference]: Without dead ends: 4543 [2021-03-10 23:41:01,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 3655.9ms TimeCoverageRelationStatistics Valid=501, Invalid=2049, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:41:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-03-10 23:41:01,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 3163. [2021-03-10 23:41:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 3.2944339025932954) internal successors, (10417), 3162 states have internal predecessors, (10417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 10417 transitions. [2021-03-10 23:41:01,313 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 10417 transitions. Word has length 30 [2021-03-10 23:41:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:01,313 INFO L480 AbstractCegarLoop]: Abstraction has 3163 states and 10417 transitions. [2021-03-10 23:41:01,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 10417 transitions. [2021-03-10 23:41:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:01,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:01,317 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:01,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-03-10 23:41:01,518 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:01,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1727513917, now seen corresponding path program 35 times [2021-03-10 23:41:01,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:01,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046983190] [2021-03-10 23:41:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:01,825 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:41:01,946 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-03-10 23:41:02,091 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:41:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:02,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046983190] [2021-03-10 23:41:02,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782982214] [2021-03-10 23:41:02,225 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 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 [2021-03-10 23:41:02,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:41:02,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:41:02,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:02,734 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 23:41:02,734 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 165 treesize of output 141 [2021-03-10 23:41:02,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:02,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:02,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:02,750 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 13 treesize of output 7 [2021-03-10 23:41:02,753 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:41:02,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:02,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:02,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:168, output treesize:3 [2021-03-10 23:41:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:02,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:02,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 23:41:02,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633241478] [2021-03-10 23:41:02,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:41:02,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:02,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:41:02,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:41:02,802 INFO L87 Difference]: Start difference. First operand 3163 states and 10417 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:04,863 INFO L93 Difference]: Finished difference Result 3973 states and 12907 transitions. [2021-03-10 23:41:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:41:04,864 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:41:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:04,871 INFO L225 Difference]: With dead ends: 3973 [2021-03-10 23:41:04,871 INFO L226 Difference]: Without dead ends: 3958 [2021-03-10 23:41:04,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1963.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:41:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-03-10 23:41:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 3182. [2021-03-10 23:41:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 3.2948758252121975) internal successors, (10481), 3181 states have internal predecessors, (10481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 10481 transitions. [2021-03-10 23:41:04,908 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 10481 transitions. Word has length 30 [2021-03-10 23:41:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:04,908 INFO L480 AbstractCegarLoop]: Abstraction has 3182 states and 10481 transitions. [2021-03-10 23:41:04,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 10481 transitions. [2021-03-10 23:41:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:04,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:04,912 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:05,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-03-10 23:41:05,112 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:05,112 INFO L82 PathProgramCache]: Analyzing trace with hash 78034219, now seen corresponding path program 36 times [2021-03-10 23:41:05,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:05,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016257234] [2021-03-10 23:41:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:05,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016257234] [2021-03-10 23:41:05,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402755998] [2021-03-10 23:41:05,746 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 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 [2021-03-10 23:41:05,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:41:05,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:05,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:41:05,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:06,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:06,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:06,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:06,066 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 37 treesize of output 37 [2021-03-10 23:41:06,069 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:41:06,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:06,086 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 13 treesize of output 7 [2021-03-10 23:41:06,089 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:41:06,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:06,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:06,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-03-10 23:41:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:06,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:06,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:41:06,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210733675] [2021-03-10 23:41:06,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:41:06,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:06,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:41:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:41:06,232 INFO L87 Difference]: Start difference. First operand 3182 states and 10481 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:06,831 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-03-10 23:41:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:09,917 INFO L93 Difference]: Finished difference Result 4778 states and 15468 transitions. [2021-03-10 23:41:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:41:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:41:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:09,926 INFO L225 Difference]: With dead ends: 4778 [2021-03-10 23:41:09,926 INFO L226 Difference]: Without dead ends: 4753 [2021-03-10 23:41:09,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2962.7ms TimeCoverageRelationStatistics Valid=436, Invalid=2534, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:41:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4753 states. [2021-03-10 23:41:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4753 to 3171. [2021-03-10 23:41:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 3170 states have (on average 3.2936908517350156) internal successors, (10441), 3170 states have internal predecessors, (10441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 10441 transitions. [2021-03-10 23:41:09,970 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 10441 transitions. Word has length 30 [2021-03-10 23:41:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:09,971 INFO L480 AbstractCegarLoop]: Abstraction has 3171 states and 10441 transitions. [2021-03-10 23:41:09,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 10441 transitions. [2021-03-10 23:41:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:09,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:09,974 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:10,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:10,175 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:10,175 INFO L82 PathProgramCache]: Analyzing trace with hash 917184943, now seen corresponding path program 37 times [2021-03-10 23:41:10,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:10,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189756131] [2021-03-10 23:41:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:10,443 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 23:41:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:10,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189756131] [2021-03-10 23:41:10,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051802088] [2021-03-10 23:41:10,773 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 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 [2021-03-10 23:41:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:10,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:41:10,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:11,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:11,140 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 31 treesize of output 39 [2021-03-10 23:41:11,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:41:11,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:11,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:11,182 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:41:11,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:11,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:11,222 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:41:11,222 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 28 [2021-03-10 23:41:11,225 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:11,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:11,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:11,260 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:44 [2021-03-10 23:41:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:11,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:11,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:41:11,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17520731] [2021-03-10 23:41:11,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:41:11,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:41:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:41:11,486 INFO L87 Difference]: Start difference. First operand 3171 states and 10441 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) 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) [2021-03-10 23:41:11,912 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 23:41:12,545 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-03-10 23:41:12,743 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-10 23:41:13,300 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-03-10 23:41:13,556 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-03-10 23:41:14,071 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-03-10 23:41:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:14,956 INFO L93 Difference]: Finished difference Result 4507 states and 14595 transitions. [2021-03-10 23:41:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:41:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 30 [2021-03-10 23:41:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:14,964 INFO L225 Difference]: With dead ends: 4507 [2021-03-10 23:41:14,965 INFO L226 Difference]: Without dead ends: 4482 [2021-03-10 23:41:14,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 3169.1ms TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:41:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4482 states. [2021-03-10 23:41:14,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4482 to 3179. [2021-03-10 23:41:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 3.29295154185022) internal successors, (10465), 3178 states have internal predecessors, (10465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 10465 transitions. [2021-03-10 23:41:15,005 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 10465 transitions. Word has length 30 [2021-03-10 23:41:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:15,005 INFO L480 AbstractCegarLoop]: Abstraction has 3179 states and 10465 transitions. [2021-03-10 23:41:15,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) 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) [2021-03-10 23:41:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 10465 transitions. [2021-03-10 23:41:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:15,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:15,009 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:15,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:15,209 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:15,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2093475736, now seen corresponding path program 44 times [2021-03-10 23:41:15,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:15,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438354224] [2021-03-10 23:41:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:15,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438354224] [2021-03-10 23:41:15,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869003226] [2021-03-10 23:41:15,903 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 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 [2021-03-10 23:41:15,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:15,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:15,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:41:15,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:16,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:16,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:16,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:16,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:16,371 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 35 treesize of output 25 [2021-03-10 23:41:16,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:16,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:16,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:16,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:16,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:16,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:16,392 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 22 treesize of output 3 [2021-03-10 23:41:16,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:16,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:16,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:16,403 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:41:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:16,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:16,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:41:16,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781886233] [2021-03-10 23:41:16,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:41:16,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:16,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:41:16,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:41:16,453 INFO L87 Difference]: Start difference. First operand 3179 states and 10465 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:21,119 INFO L93 Difference]: Finished difference Result 4195 states and 13420 transitions. [2021-03-10 23:41:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:41:21,120 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:41:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:21,126 INFO L225 Difference]: With dead ends: 4195 [2021-03-10 23:41:21,126 INFO L226 Difference]: Without dead ends: 4169 [2021-03-10 23:41:21,127 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 4109.9ms TimeCoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:41:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-03-10 23:41:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3173. [2021-03-10 23:41:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 3.2944514501891553) internal successors, (10450), 3172 states have internal predecessors, (10450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 10450 transitions. [2021-03-10 23:41:21,164 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 10450 transitions. Word has length 30 [2021-03-10 23:41:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:21,164 INFO L480 AbstractCegarLoop]: Abstraction has 3173 states and 10450 transitions. [2021-03-10 23:41:21,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 10450 transitions. [2021-03-10 23:41:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:21,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:21,168 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:21,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:41:21,373 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2024451534, now seen corresponding path program 45 times [2021-03-10 23:41:21,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:21,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199677222] [2021-03-10 23:41:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:22,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199677222] [2021-03-10 23:41:22,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691068978] [2021-03-10 23:41:22,126 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 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 [2021-03-10 23:41:22,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:41:22,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:22,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:41:22,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:22,936 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-10 23:41:22,936 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 165 treesize of output 141 [2021-03-10 23:41:22,940 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:22,966 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.6 percent of original size [2021-03-10 23:41:22,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:22,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:22,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:22,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:22,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-03-10 23:41:22,979 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:41:22,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:22,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:22,991 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:173, output treesize:3 [2021-03-10 23:41:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:23,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:23,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-03-10 23:41:23,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093134814] [2021-03-10 23:41:23,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:41:23,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:23,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:41:23,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:41:23,029 INFO L87 Difference]: Start difference. First operand 3173 states and 10450 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:28,706 INFO L93 Difference]: Finished difference Result 4127 states and 13260 transitions. [2021-03-10 23:41:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:41:28,707 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:41:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:28,713 INFO L225 Difference]: With dead ends: 4127 [2021-03-10 23:41:28,713 INFO L226 Difference]: Without dead ends: 4101 [2021-03-10 23:41:28,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 4805.7ms TimeCoverageRelationStatistics Valid=498, Invalid=3792, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:41:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-03-10 23:41:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3209. [2021-03-10 23:41:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 3.2874064837905235) internal successors, (10546), 3208 states have internal predecessors, (10546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 10546 transitions. [2021-03-10 23:41:28,751 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 10546 transitions. Word has length 30 [2021-03-10 23:41:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:28,751 INFO L480 AbstractCegarLoop]: Abstraction has 3209 states and 10546 transitions. [2021-03-10 23:41:28,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 10546 transitions. [2021-03-10 23:41:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:28,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:28,755 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:28,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 23:41:28,955 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:28,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:28,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2062214116, now seen corresponding path program 46 times [2021-03-10 23:41:28,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:28,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649368637] [2021-03-10 23:41:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:29,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649368637] [2021-03-10 23:41:29,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557691473] [2021-03-10 23:41:29,703 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 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 [2021-03-10 23:41:29,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:41:29,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:41:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:30,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:30,199 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-03-10 23:41:30,199 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 177 treesize of output 143 [2021-03-10 23:41:30,203 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:30,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:30,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:30,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:30,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:41:30,225 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:41:30,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:30,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:30,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:180, output treesize:3 [2021-03-10 23:41:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:30,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:30,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-03-10 23:41:30,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729503948] [2021-03-10 23:41:30,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:41:30,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:30,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:41:30,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:41:30,288 INFO L87 Difference]: Start difference. First operand 3209 states and 10546 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) [2021-03-10 23:41:30,966 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:41:32,069 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:41:32,260 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 23:41:33,850 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-03-10 23:41:34,144 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-03-10 23:41:35,639 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:41:36,053 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:41:36,416 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:41:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:37,303 INFO L93 Difference]: Finished difference Result 4389 states and 14152 transitions. [2021-03-10 23:41:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 23:41:37,305 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 [2021-03-10 23:41:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:37,311 INFO L225 Difference]: With dead ends: 4389 [2021-03-10 23:41:37,311 INFO L226 Difference]: Without dead ends: 4363 [2021-03-10 23:41:37,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 5950.8ms TimeCoverageRelationStatistics Valid=725, Invalid=4975, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 23:41:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-03-10 23:41:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3213. [2021-03-10 23:41:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 3.286425902864259) internal successors, (10556), 3212 states have internal predecessors, (10556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 10556 transitions. [2021-03-10 23:41:37,351 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 10556 transitions. Word has length 30 [2021-03-10 23:41:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:37,351 INFO L480 AbstractCegarLoop]: Abstraction has 3213 states and 10556 transitions. [2021-03-10 23:41:37,351 INFO L481 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) [2021-03-10 23:41:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 10556 transitions. [2021-03-10 23:41:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:37,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:37,355 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:37,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-03-10 23:41:37,555 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash -658037194, now seen corresponding path program 47 times [2021-03-10 23:41:37,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:37,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005625962] [2021-03-10 23:41:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:38,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005625962] [2021-03-10 23:41:38,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612882831] [2021-03-10 23:41:38,304 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 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 [2021-03-10 23:41:38,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:41:38,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:41:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:38,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:38,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:38,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:38,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:38,826 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 35 treesize of output 25 [2021-03-10 23:41:38,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:38,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:38,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:38,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:38,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:38,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:38,847 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 22 treesize of output 3 [2021-03-10 23:41:38,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:38,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:38,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:38,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:41:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:38,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:38,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:41:38,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604643923] [2021-03-10 23:41:38,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:41:38,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:38,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:41:38,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:41:38,902 INFO L87 Difference]: Start difference. First operand 3213 states and 10556 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:41:40,403 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:41:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:43,886 INFO L93 Difference]: Finished difference Result 4217 states and 13517 transitions. [2021-03-10 23:41:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:41:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-03-10 23:41:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:43,893 INFO L225 Difference]: With dead ends: 4217 [2021-03-10 23:41:43,893 INFO L226 Difference]: Without dead ends: 4191 [2021-03-10 23:41:43,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4096.8ms TimeCoverageRelationStatistics Valid=430, Invalid=2876, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:41:43,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-03-10 23:41:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3237. [2021-03-10 23:41:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 3.280593325092707) internal successors, (10616), 3236 states have internal predecessors, (10616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 10616 transitions. [2021-03-10 23:41:43,931 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 10616 transitions. Word has length 30 [2021-03-10 23:41:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:43,931 INFO L480 AbstractCegarLoop]: Abstraction has 3237 states and 10616 transitions. [2021-03-10 23:41:43,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:41:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 10616 transitions. [2021-03-10 23:41:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:43,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:43,935 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:44,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-10 23:41:44,135 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:44,135 INFO L82 PathProgramCache]: Analyzing trace with hash 797183161, now seen corresponding path program 38 times [2021-03-10 23:41:44,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:44,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281595314] [2021-03-10 23:41:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:44,446 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:41:44,569 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:41:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:44,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281595314] [2021-03-10 23:41:44,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169177509] [2021-03-10 23:41:44,911 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 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 [2021-03-10 23:41:44,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:41:44,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:41:44,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:45,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:45,490 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 31 treesize of output 39 [2021-03-10 23:41:45,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:41:45,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:45,585 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:41:45,585 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 28 [2021-03-10 23:41:45,589 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:45,592 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:41:45,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:45,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:45,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:45,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:45,649 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:47, output treesize:68 [2021-03-10 23:41:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:45,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:45,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-03-10 23:41:45,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904628480] [2021-03-10 23:41:45,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:41:45,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:45,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:41:45,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:41:45,816 INFO L87 Difference]: Start difference. First operand 3237 states and 10616 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) [2021-03-10 23:41:46,395 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 23:41:47,008 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-10 23:41:47,232 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 23:41:47,549 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 23:41:47,849 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 23:41:48,198 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 23:41:48,738 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 23:41:49,155 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 23:41:49,547 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 23:41:49,727 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 23:41:49,904 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 23:41:50,271 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 23:41:50,779 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-10 23:41:51,463 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-10 23:41:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:41:52,267 INFO L93 Difference]: Finished difference Result 4846 states and 15281 transitions. [2021-03-10 23:41:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:41:52,269 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 [2021-03-10 23:41:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:41:52,276 INFO L225 Difference]: With dead ends: 4846 [2021-03-10 23:41:52,276 INFO L226 Difference]: Without dead ends: 4816 [2021-03-10 23:41:52,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 5455.3ms TimeCoverageRelationStatistics Valid=592, Invalid=3068, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:41:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4816 states. [2021-03-10 23:41:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4816 to 3272. [2021-03-10 23:41:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3271 states have (on average 3.2885967594007948) internal successors, (10757), 3271 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:41:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 10757 transitions. [2021-03-10 23:41:52,317 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 10757 transitions. Word has length 30 [2021-03-10 23:41:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:41:52,318 INFO L480 AbstractCegarLoop]: Abstraction has 3272 states and 10757 transitions. [2021-03-10 23:41:52,318 INFO L481 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) [2021-03-10 23:41:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 10757 transitions. [2021-03-10 23:41:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:41:52,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:41:52,321 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:41:52,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-03-10 23:41:52,522 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:41:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:41:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash -764290802, now seen corresponding path program 48 times [2021-03-10 23:41:52,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:41:52,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743851275] [2021-03-10 23:41:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:41:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:41:53,153 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 23:41:53,314 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 23:41:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:53,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743851275] [2021-03-10 23:41:53,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656690283] [2021-03-10 23:41:53,520 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 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 [2021-03-10 23:41:53,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:41:53,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:41:53,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:41:53,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:41:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:54,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:54,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:54,121 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 35 treesize of output 25 [2021-03-10 23:41:54,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:54,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:41:54,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:54,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:41:54,142 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 22 treesize of output 3 [2021-03-10 23:41:54,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:41:54,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:41:54,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:41:54,155 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:41:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:41:54,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:41:54,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:41:54,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969148807] [2021-03-10 23:41:54,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:41:54,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:41:54,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:41:54,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:41:54,202 INFO L87 Difference]: Start difference. First operand 3272 states and 10757 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:41:55,918 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:41:56,060 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:41:56,372 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-10 23:41:56,689 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 23:41:57,109 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:41:58,053 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 23:41:58,512 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 23:41:58,693 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2021-03-10 23:41:59,087 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 23:41:59,637 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:41:59,945 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-03-10 23:42:00,323 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-10 23:42:00,572 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-03-10 23:42:00,959 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:42:01,589 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-10 23:42:02,754 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:42:03,640 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-03-10 23:42:04,469 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 23:42:04,632 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-10 23:42:04,812 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-03-10 23:42:05,098 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-03-10 23:42:05,785 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 23:42:06,316 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 23:42:06,569 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-03-10 23:42:06,900 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:42:07,081 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 23:42:07,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:07,710 INFO L93 Difference]: Finished difference Result 4972 states and 15679 transitions. [2021-03-10 23:42:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-03-10 23:42:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-03-10 23:42:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:07,718 INFO L225 Difference]: With dead ends: 4972 [2021-03-10 23:42:07,718 INFO L226 Difference]: Without dead ends: 4943 [2021-03-10 23:42:07,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3372 ImplicationChecksByTransitivity, 10746.6ms TimeCoverageRelationStatistics Valid=1299, Invalid=8801, Unknown=0, NotChecked=0, Total=10100 [2021-03-10 23:42:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2021-03-10 23:42:07,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 3287. [2021-03-10 23:42:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 3286 states have (on average 3.2933657942787584) internal successors, (10822), 3286 states have internal predecessors, (10822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 10822 transitions. [2021-03-10 23:42:07,759 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 10822 transitions. Word has length 30 [2021-03-10 23:42:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:07,759 INFO L480 AbstractCegarLoop]: Abstraction has 3287 states and 10822 transitions. [2021-03-10 23:42:07,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:42:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 10822 transitions. [2021-03-10 23:42:07,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:42:07,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:07,763 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:07,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-03-10 23:42:07,967 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:07,967 INFO L82 PathProgramCache]: Analyzing trace with hash -275770114, now seen corresponding path program 49 times [2021-03-10 23:42:07,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:07,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426444478] [2021-03-10 23:42:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:08,224 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:42:08,456 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:42:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:08,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426444478] [2021-03-10 23:42:08,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186168677] [2021-03-10 23:42:08,978 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 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 [2021-03-10 23:42:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:08,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:42:08,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:09,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:09,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:09,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:09,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:09,607 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 35 treesize of output 25 [2021-03-10 23:42:09,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:09,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:09,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:09,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:09,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:09,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:09,631 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 22 treesize of output 3 [2021-03-10 23:42:09,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:09,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:09,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:09,644 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:42:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:09,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:09,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-03-10 23:42:09,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607628962] [2021-03-10 23:42:09,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:42:09,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:42:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:42:09,708 INFO L87 Difference]: Start difference. First operand 3287 states and 10822 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:13,026 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-03-10 23:42:13,898 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-10 23:42:14,854 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 23:42:15,395 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 23:42:15,804 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 23:42:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:17,554 INFO L93 Difference]: Finished difference Result 6121 states and 19204 transitions. [2021-03-10 23:42:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 23:42:17,556 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:42:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:17,564 INFO L225 Difference]: With dead ends: 6121 [2021-03-10 23:42:17,565 INFO L226 Difference]: Without dead ends: 6100 [2021-03-10 23:42:17,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 6275.2ms TimeCoverageRelationStatistics Valid=840, Invalid=5802, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 23:42:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2021-03-10 23:42:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 3399. [2021-03-10 23:42:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3398 states have (on average 3.294290759270159) internal successors, (11194), 3398 states have internal predecessors, (11194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 11194 transitions. [2021-03-10 23:42:17,616 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 11194 transitions. Word has length 30 [2021-03-10 23:42:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:17,616 INFO L480 AbstractCegarLoop]: Abstraction has 3399 states and 11194 transitions. [2021-03-10 23:42:17,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 11194 transitions. [2021-03-10 23:42:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:42:17,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:17,620 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:17,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-03-10 23:42:17,821 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash 909137373, now seen corresponding path program 39 times [2021-03-10 23:42:17,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:17,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724604046] [2021-03-10 23:42:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:18,170 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:42:18,312 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:42:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:18,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724604046] [2021-03-10 23:42:18,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207634066] [2021-03-10 23:42:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:18,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:42:18,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:18,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:42:18,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:19,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:19,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:19,159 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 31 treesize of output 39 [2021-03-10 23:42:19,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:42:19,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:19,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:19,226 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:42:19,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:19,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:19,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:19,303 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:42:19,303 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 28 [2021-03-10 23:42:19,308 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:19,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:19,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:19,376 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-03-10 23:42:19,517 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-03-10 23:42:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:19,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:19,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:42:19,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306063830] [2021-03-10 23:42:19,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:42:19,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:19,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:42:19,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:42:19,596 INFO L87 Difference]: Start difference. First operand 3399 states and 11194 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) 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) [2021-03-10 23:42:19,969 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-03-10 23:42:20,426 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-03-10 23:42:20,582 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-03-10 23:42:20,886 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 23:42:21,479 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-03-10 23:42:21,701 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 23:42:22,038 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:42:22,230 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 23:42:22,539 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-10 23:42:22,887 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-10 23:42:23,411 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 23:42:23,865 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 23:42:24,225 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-03-10 23:42:24,691 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-03-10 23:42:25,060 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-10 23:42:25,421 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 23:42:25,770 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-10 23:42:26,060 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 23:42:26,442 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 23:42:27,201 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-03-10 23:42:27,576 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 23:42:28,091 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-03-10 23:42:28,232 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:42:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:28,640 INFO L93 Difference]: Finished difference Result 5441 states and 17311 transitions. [2021-03-10 23:42:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 23:42:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) 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 30 [2021-03-10 23:42:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:28,650 INFO L225 Difference]: With dead ends: 5441 [2021-03-10 23:42:28,650 INFO L226 Difference]: Without dead ends: 5422 [2021-03-10 23:42:28,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 7941.7ms TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:42:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5422 states. [2021-03-10 23:42:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5422 to 3412. [2021-03-10 23:42:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.2961008501905598) internal successors, (11243), 3411 states have internal predecessors, (11243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 11243 transitions. [2021-03-10 23:42:28,697 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 11243 transitions. Word has length 30 [2021-03-10 23:42:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:28,697 INFO L480 AbstractCegarLoop]: Abstraction has 3412 states and 11243 transitions. [2021-03-10 23:42:28,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) 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) [2021-03-10 23:42:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 11243 transitions. [2021-03-10 23:42:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:42:28,701 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:28,701 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:28,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:28,901 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1780857269, now seen corresponding path program 40 times [2021-03-10 23:42:28,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:28,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340873042] [2021-03-10 23:42:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:29,115 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:42:29,269 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:42:29,418 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:42:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:29,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340873042] [2021-03-10 23:42:29,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864058550] [2021-03-10 23:42:29,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:42:29,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:42:29,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:29,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:42:29,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:30,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:30,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:30,440 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 31 treesize of output 23 [2021-03-10 23:42:30,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:30,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:30,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:30,466 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 12 treesize of output 3 [2021-03-10 23:42:30,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:42:30,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:30,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:30,484 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:42:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:30,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:30,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:42:30,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244889561] [2021-03-10 23:42:30,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:42:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:30,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:42:30,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:42:30,533 INFO L87 Difference]: Start difference. First operand 3412 states and 11243 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:30,870 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:42:31,230 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-03-10 23:42:31,600 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 23:42:32,014 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 23:42:32,258 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 23:42:32,557 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 23:42:32,974 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-10 23:42:33,337 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 23:42:33,632 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 23:42:34,056 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-10 23:42:34,421 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 23:42:34,690 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 23:42:36,138 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 23:42:36,514 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-03-10 23:42:36,678 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:42:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:37,132 INFO L93 Difference]: Finished difference Result 4831 states and 15425 transitions. [2021-03-10 23:42:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:42:37,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:42:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:37,141 INFO L225 Difference]: With dead ends: 4831 [2021-03-10 23:42:37,141 INFO L226 Difference]: Without dead ends: 4816 [2021-03-10 23:42:37,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 5673.0ms TimeCoverageRelationStatistics Valid=534, Invalid=2328, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:42:37,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4816 states. [2021-03-10 23:42:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4816 to 3398. [2021-03-10 23:42:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 3.292905504857227) internal successors, (11186), 3397 states have internal predecessors, (11186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 11186 transitions. [2021-03-10 23:42:37,194 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 11186 transitions. Word has length 30 [2021-03-10 23:42:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:37,194 INFO L480 AbstractCegarLoop]: Abstraction has 3398 states and 11186 transitions. [2021-03-10 23:42:37,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 11186 transitions. [2021-03-10 23:42:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:42:37,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:37,197 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:37,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:42:37,398 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:37,398 INFO L82 PathProgramCache]: Analyzing trace with hash -559141840, now seen corresponding path program 50 times [2021-03-10 23:42:37,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:37,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51444853] [2021-03-10 23:42:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:37,647 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:42:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:38,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51444853] [2021-03-10 23:42:38,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861939505] [2021-03-10 23:42:38,388 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 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 [2021-03-10 23:42:38,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:42:38,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:42:38,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:38,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:38,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:38,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:38,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-03-10 23:42:38,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:42:39,035 INFO L628 ElimStorePlain]: treesize reduction 39, result has 44.3 percent of original size [2021-03-10 23:42:39,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:42:39,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:42:39,047 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:42:39,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:39,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:39,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2021-03-10 23:42:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:39,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:39,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-03-10 23:42:39,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639758589] [2021-03-10 23:42:39,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:42:39,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:39,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:42:39,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:42:39,210 INFO L87 Difference]: Start difference. First operand 3398 states and 11186 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:39,776 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-10 23:42:40,798 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-03-10 23:42:40,969 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:42:41,430 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-03-10 23:42:41,625 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-03-10 23:42:42,079 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:42:42,415 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-10 23:42:42,604 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:42:43,429 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:42:43,872 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 23:42:44,280 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 23:42:44,558 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-03-10 23:42:44,934 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 23:42:45,482 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-03-10 23:42:46,842 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-10 23:42:47,360 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 23:42:48,114 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-03-10 23:42:48,288 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2021-03-10 23:42:48,472 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-10 23:42:48,675 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-03-10 23:42:48,979 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 23:42:49,198 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:42:49,645 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 23:42:50,283 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-03-10 23:42:50,706 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 23:42:51,257 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 23:42:51,488 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:42:51,707 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:42:52,475 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 23:42:52,703 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:42:53,738 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 23:42:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:42:54,200 INFO L93 Difference]: Finished difference Result 6799 states and 21050 transitions. [2021-03-10 23:42:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-03-10 23:42:54,202 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:42:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:42:54,211 INFO L225 Difference]: With dead ends: 6799 [2021-03-10 23:42:54,212 INFO L226 Difference]: Without dead ends: 6737 [2021-03-10 23:42:54,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4380 ImplicationChecksByTransitivity, 12282.7ms TimeCoverageRelationStatistics Valid=1823, Invalid=10609, Unknown=0, NotChecked=0, Total=12432 [2021-03-10 23:42:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2021-03-10 23:42:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 3510. [2021-03-10 23:42:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 3509 states have (on average 3.2898261612995157) internal successors, (11544), 3509 states have internal predecessors, (11544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 11544 transitions. [2021-03-10 23:42:54,268 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 11544 transitions. Word has length 30 [2021-03-10 23:42:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:42:54,268 INFO L480 AbstractCegarLoop]: Abstraction has 3510 states and 11544 transitions. [2021-03-10 23:42:54,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 11544 transitions. [2021-03-10 23:42:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:42:54,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:42:54,272 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:42:54,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-10 23:42:54,472 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:42:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:42:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2009186343, now seen corresponding path program 41 times [2021-03-10 23:42:54,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:42:54,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960358206] [2021-03-10 23:42:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:42:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:42:54,711 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:42:54,880 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:42:55,044 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:42:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:55,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960358206] [2021-03-10 23:42:55,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886746241] [2021-03-10 23:42:55,372 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 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 [2021-03-10 23:42:55,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:42:55,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:42:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:42:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:42:55,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:55,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:55,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-03-10 23:42:55,970 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:42:55,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:56,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:42:56,006 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 17 treesize of output 9 [2021-03-10 23:42:56,011 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:42:56,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:42:56,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:42:56,049 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:39 [2021-03-10 23:42:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:42:56,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:42:56,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 23:42:56,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952127579] [2021-03-10 23:42:56,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:42:56,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:42:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:42:56,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:42:56,327 INFO L87 Difference]: Start difference. First operand 3510 states and 11544 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:42:56,589 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-03-10 23:42:56,998 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-03-10 23:42:57,199 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 23:42:57,510 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 23:42:57,754 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:42:58,093 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 23:42:58,322 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 23:42:58,592 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:42:58,750 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 23:42:58,994 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 23:42:59,356 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 23:42:59,716 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 23:42:59,978 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:43:00,270 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 23:43:00,540 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 23:43:00,949 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 23:43:01,364 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-10 23:43:01,647 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 23:43:02,351 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-10 23:43:03,090 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:43:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:04,159 INFO L93 Difference]: Finished difference Result 4628 states and 15016 transitions. [2021-03-10 23:43:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:43:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:43:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:04,168 INFO L225 Difference]: With dead ends: 4628 [2021-03-10 23:43:04,168 INFO L226 Difference]: Without dead ends: 4603 [2021-03-10 23:43:04,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 6410.5ms TimeCoverageRelationStatistics Valid=498, Invalid=2694, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:43:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4603 states. [2021-03-10 23:43:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4603 to 3504. [2021-03-10 23:43:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3504 states, 3503 states have (on average 3.2906080502426494) internal successors, (11527), 3503 states have internal predecessors, (11527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 11527 transitions. [2021-03-10 23:43:04,210 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 11527 transitions. Word has length 30 [2021-03-10 23:43:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:04,210 INFO L480 AbstractCegarLoop]: Abstraction has 3504 states and 11527 transitions. [2021-03-10 23:43:04,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 11527 transitions. [2021-03-10 23:43:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:43:04,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:04,214 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:04,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-03-10 23:43:04,414 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1162957145, now seen corresponding path program 42 times [2021-03-10 23:43:04,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:04,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452092426] [2021-03-10 23:43:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:04,686 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:43:04,865 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:43:05,034 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:43:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:05,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452092426] [2021-03-10 23:43:05,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546754735] [2021-03-10 23:43:05,329 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 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 [2021-03-10 23:43:05,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:43:05,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:05,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 23:43:05,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:05,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:05,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:05,933 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 37 treesize of output 45 [2021-03-10 23:43:05,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:43:05,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:06,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:06,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-10 23:43:06,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:06,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:06,074 INFO L354 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2021-03-10 23:43:06,075 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 32 treesize of output 29 [2021-03-10 23:43:06,080 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:06,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:06,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:06,147 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:96 [2021-03-10 23:43:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:06,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:06,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 23:43:06,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281704771] [2021-03-10 23:43:06,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:43:06,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:06,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:43:06,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:43:06,573 INFO L87 Difference]: Start difference. First operand 3504 states and 11527 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:06,876 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:43:07,041 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:43:07,242 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 31 [2021-03-10 23:43:07,900 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-03-10 23:43:08,110 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 37 [2021-03-10 23:43:08,341 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-10 23:43:08,794 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 23:43:09,361 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-03-10 23:43:09,727 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-10 23:43:09,996 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:43:10,492 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-10 23:43:10,804 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 23:43:11,051 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 23:43:11,417 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:43:11,889 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 23:43:12,114 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 23:43:12,355 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 23:43:12,778 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-03-10 23:43:13,382 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-03-10 23:43:13,743 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 23:43:13,992 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-03-10 23:43:14,460 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-10 23:43:14,924 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 23:43:15,167 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-10 23:43:15,379 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:43:15,724 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 23:43:15,928 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-10 23:43:16,482 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 23:43:16,749 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-03-10 23:43:16,952 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:43:17,167 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-10 23:43:17,409 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-10 23:43:17,749 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-03-10 23:43:18,204 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-03-10 23:43:18,504 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-03-10 23:43:19,238 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2021-03-10 23:43:19,401 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-10 23:43:19,662 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 23:43:20,180 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-03-10 23:43:20,430 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 23:43:20,978 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:43:21,476 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 23:43:21,684 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 23:43:21,972 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:43:22,347 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-03-10 23:43:22,938 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:43:23,091 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:43:23,590 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:43:23,945 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:43:24,250 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:43:24,523 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 23:43:24,967 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-03-10 23:43:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:25,325 INFO L93 Difference]: Finished difference Result 6079 states and 19181 transitions. [2021-03-10 23:43:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 23:43:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:43:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:25,336 INFO L225 Difference]: With dead ends: 6079 [2021-03-10 23:43:25,336 INFO L226 Difference]: Without dead ends: 6037 [2021-03-10 23:43:25,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 15199.0ms TimeCoverageRelationStatistics Valid=1069, Invalid=7121, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 23:43:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6037 states. [2021-03-10 23:43:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6037 to 3546. [2021-03-10 23:43:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 3.297320169252468) internal successors, (11689), 3545 states have internal predecessors, (11689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 11689 transitions. [2021-03-10 23:43:25,389 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 11689 transitions. Word has length 30 [2021-03-10 23:43:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:25,389 INFO L480 AbstractCegarLoop]: Abstraction has 3546 states and 11689 transitions. [2021-03-10 23:43:25,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 11689 transitions. [2021-03-10 23:43:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:43:25,393 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:25,393 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:25,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:25,593 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2034677041, now seen corresponding path program 43 times [2021-03-10 23:43:25,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:25,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570702440] [2021-03-10 23:43:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:25,856 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:43:26,062 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:43:26,244 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:43:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:26,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570702440] [2021-03-10 23:43:26,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798043176] [2021-03-10 23:43:26,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:43:26,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:27,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:27,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:27,356 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 31 treesize of output 23 [2021-03-10 23:43:27,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:27,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:27,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:27,387 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 12 treesize of output 3 [2021-03-10 23:43:27,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:27,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:27,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:27,409 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:43:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:27,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:27,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-03-10 23:43:27,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364357647] [2021-03-10 23:43:27,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:43:27,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:27,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:43:27,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:43:27,470 INFO L87 Difference]: Start difference. First operand 3546 states and 11689 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:27,858 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 23:43:28,338 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-03-10 23:43:28,550 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-03-10 23:43:28,914 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 23:43:29,356 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 23:43:29,671 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 23:43:29,855 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 23:43:30,292 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 23:43:30,757 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-03-10 23:43:30,955 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-03-10 23:43:31,291 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-10 23:43:31,566 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-10 23:43:32,139 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 23:43:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:33,403 INFO L93 Difference]: Finished difference Result 4486 states and 14541 transitions. [2021-03-10 23:43:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:43:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:43:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:33,412 INFO L225 Difference]: With dead ends: 4486 [2021-03-10 23:43:33,412 INFO L226 Difference]: Without dead ends: 4471 [2021-03-10 23:43:33,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 5387.9ms TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:43:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2021-03-10 23:43:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 3546. [2021-03-10 23:43:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 3.2942172073342735) internal successors, (11678), 3545 states have internal predecessors, (11678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 11678 transitions. [2021-03-10 23:43:33,454 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 11678 transitions. Word has length 30 [2021-03-10 23:43:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:33,454 INFO L480 AbstractCegarLoop]: Abstraction has 3546 states and 11678 transitions. [2021-03-10 23:43:33,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 11678 transitions. [2021-03-10 23:43:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:43:33,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:33,458 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:33,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:33,663 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash 332589623, now seen corresponding path program 44 times [2021-03-10 23:43:33,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:33,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643698356] [2021-03-10 23:43:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:33,952 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:43:34,164 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:43:34,369 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:43:34,507 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:43:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:34,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643698356] [2021-03-10 23:43:34,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590470534] [2021-03-10 23:43:34,724 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 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 [2021-03-10 23:43:34,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:43:34,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:43:34,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:35,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:35,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-03-10 23:43:35,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:43:35,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:43:35,528 INFO L354 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2021-03-10 23:43:35,528 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 34 treesize of output 33 [2021-03-10 23:43:35,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:35,537 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-10 23:43:35,544 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:43:35,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:35,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:35,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:35,629 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:96 [2021-03-10 23:43:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:36,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:36,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 23:43:36,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790337060] [2021-03-10 23:43:36,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:43:36,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:36,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:43:36,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:43:36,054 INFO L87 Difference]: Start difference. First operand 3546 states and 11678 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:36,512 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 19 [2021-03-10 23:43:36,689 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-03-10 23:43:37,142 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-10 23:43:37,361 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2021-03-10 23:43:37,576 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-10 23:43:38,061 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 23:43:38,673 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-03-10 23:43:38,869 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:43:39,429 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 23:43:39,692 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:43:40,122 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:43:40,615 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 23:43:40,830 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 23:43:41,372 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-10 23:43:41,908 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-03-10 23:43:42,300 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 23:43:42,829 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 23:43:43,237 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 23:43:43,485 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:43:44,185 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2021-03-10 23:43:44,390 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:43:44,782 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-03-10 23:43:45,196 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 23:43:45,848 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-03-10 23:43:46,057 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-10 23:43:46,552 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-03-10 23:43:46,821 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 23:43:47,192 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:43:47,633 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 23:43:47,990 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:43:48,476 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-10 23:43:49,007 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:43:49,171 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-03-10 23:43:49,495 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-03-10 23:43:49,779 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:43:49,998 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2021-03-10 23:43:50,272 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 23:43:50,482 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 23:43:50,861 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 17 [2021-03-10 23:43:51,241 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 23:43:51,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:43:51,755 INFO L93 Difference]: Finished difference Result 5798 states and 18354 transitions. [2021-03-10 23:43:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 23:43:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:43:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:43:51,766 INFO L225 Difference]: With dead ends: 5798 [2021-03-10 23:43:51,766 INFO L226 Difference]: Without dead ends: 5721 [2021-03-10 23:43:51,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 12786.0ms TimeCoverageRelationStatistics Valid=939, Invalid=5867, Unknown=0, NotChecked=0, Total=6806 [2021-03-10 23:43:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-03-10 23:43:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 3523. [2021-03-10 23:43:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3523 states, 3522 states have (on average 3.2890403180011356) internal successors, (11584), 3522 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3523 states to 3523 states and 11584 transitions. [2021-03-10 23:43:51,819 INFO L78 Accepts]: Start accepts. Automaton has 3523 states and 11584 transitions. Word has length 30 [2021-03-10 23:43:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:43:51,819 INFO L480 AbstractCegarLoop]: Abstraction has 3523 states and 11584 transitions. [2021-03-10 23:43:51,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3523 states and 11584 transitions. [2021-03-10 23:43:51,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:43:51,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:43:51,823 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:43:52,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:52,023 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:43:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:43:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2002107869, now seen corresponding path program 45 times [2021-03-10 23:43:52,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:43:52,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576185217] [2021-03-10 23:43:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:43:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:43:52,420 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:43:52,702 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:43:52,929 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:43:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:53,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576185217] [2021-03-10 23:43:53,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832069379] [2021-03-10 23:43:53,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:43:53,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:43:53,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:43:53,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:43:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:43:53,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:53,893 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 31 treesize of output 47 [2021-03-10 23:43:53,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:43:54,053 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 23:43:54,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:54,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:43:54,067 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:43:54,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:54,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:54,197 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:43:54,197 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 52 treesize of output 45 [2021-03-10 23:43:54,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:43:54,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:43:54,398 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:43:54,399 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-03-10 23:43:54,399 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 87 treesize of output 84 [2021-03-10 23:43:54,428 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:54,675 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 23:43:54,676 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.4 percent of original size [2021-03-10 23:43:54,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:43:54,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:44, output treesize:189 [2021-03-10 23:43:55,317 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 23:43:56,181 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-10 23:43:56,600 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:43:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:43:56,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:43:56,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 23:43:56,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478982439] [2021-03-10 23:43:56,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:43:56,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:43:56,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:43:56,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:43:56,717 INFO L87 Difference]: Start difference. First operand 3523 states and 11584 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:43:57,332 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 39 [2021-03-10 23:43:57,528 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-03-10 23:43:58,370 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2021-03-10 23:43:58,681 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 45 [2021-03-10 23:43:58,919 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-10 23:43:59,882 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 23:44:00,180 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2021-03-10 23:44:00,408 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-10 23:44:00,924 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 41 [2021-03-10 23:44:01,698 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-03-10 23:44:02,124 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 23:44:02,981 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2021-03-10 23:44:03,335 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:44:04,496 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-03-10 23:44:05,053 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-10 23:44:05,431 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 25 [2021-03-10 23:44:05,999 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2021-03-10 23:44:06,256 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2021-03-10 23:44:07,101 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-03-10 23:44:07,822 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 23:44:08,364 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 23:44:09,291 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2021-03-10 23:44:10,338 WARN L205 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-03-10 23:44:11,215 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2021-03-10 23:44:11,447 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:44:12,091 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 54 [2021-03-10 23:44:13,135 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-03-10 23:44:13,491 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-10 23:44:13,742 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:44:14,037 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-10 23:44:14,368 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 23:44:14,968 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-03-10 23:44:15,162 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-10 23:44:16,129 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 23:44:16,600 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-03-10 23:44:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:17,999 INFO L93 Difference]: Finished difference Result 5554 states and 17815 transitions. [2021-03-10 23:44:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:44:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:44:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:18,011 INFO L225 Difference]: With dead ends: 5554 [2021-03-10 23:44:18,011 INFO L226 Difference]: Without dead ends: 5504 [2021-03-10 23:44:18,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 20714.5ms TimeCoverageRelationStatistics Valid=811, Invalid=4301, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 23:44:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2021-03-10 23:44:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 3544. [2021-03-10 23:44:18,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3543 states have (on average 3.290149590742309) internal successors, (11657), 3543 states have internal predecessors, (11657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 11657 transitions. [2021-03-10 23:44:18,058 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 11657 transitions. Word has length 30 [2021-03-10 23:44:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:18,058 INFO L480 AbstractCegarLoop]: Abstraction has 3544 states and 11657 transitions. [2021-03-10 23:44:18,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 11657 transitions. [2021-03-10 23:44:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:44:18,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:18,062 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:18,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:18,262 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1280953833, now seen corresponding path program 46 times [2021-03-10 23:44:18,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:18,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261102293] [2021-03-10 23:44:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:18,543 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-03-10 23:44:18,852 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:44:19,168 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:44:19,316 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:44:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:19,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261102293] [2021-03-10 23:44:19,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163025132] [2021-03-10 23:44:19,729 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 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 [2021-03-10 23:44:19,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:44:19,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:44:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:20,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:20,620 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-03-10 23:44:20,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:20,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:20,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:20,651 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 23 treesize of output 7 [2021-03-10 23:44:20,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:20,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:20,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:20,677 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-03-10 23:44:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:20,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:20,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-03-10 23:44:20,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225297202] [2021-03-10 23:44:20,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:44:20,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:20,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:44:20,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:44:20,771 INFO L87 Difference]: Start difference. First operand 3544 states and 11657 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) [2021-03-10 23:44:21,595 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 21 [2021-03-10 23:44:22,084 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 23:44:23,568 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 23:44:23,902 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 23:44:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:24,832 INFO L93 Difference]: Finished difference Result 4240 states and 13786 transitions. [2021-03-10 23:44:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:44:24,835 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 30 [2021-03-10 23:44:24,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:24,842 INFO L225 Difference]: With dead ends: 4240 [2021-03-10 23:44:24,842 INFO L226 Difference]: Without dead ends: 4221 [2021-03-10 23:44:24,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 3848.9ms TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:44:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-03-10 23:44:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 3557. [2021-03-10 23:44:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3557 states, 3556 states have (on average 3.2927446569178853) internal successors, (11709), 3556 states have internal predecessors, (11709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 11709 transitions. [2021-03-10 23:44:24,881 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 11709 transitions. Word has length 30 [2021-03-10 23:44:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:24,881 INFO L480 AbstractCegarLoop]: Abstraction has 3557 states and 11709 transitions. [2021-03-10 23:44:24,881 INFO L481 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) [2021-03-10 23:44:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 11709 transitions. [2021-03-10 23:44:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:44:24,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:24,885 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:25,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-03-10 23:44:25,088 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1929397229, now seen corresponding path program 47 times [2021-03-10 23:44:25,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:25,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766306132] [2021-03-10 23:44:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:25,376 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:44:25,614 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:44:25,847 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:44:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:26,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766306132] [2021-03-10 23:44:26,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214292188] [2021-03-10 23:44:26,184 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 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 [2021-03-10 23:44:26,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:44:26,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 23:44:26,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:27,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:27,047 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 31 treesize of output 47 [2021-03-10 23:44:27,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:44:27,197 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:44:27,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:27,287 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:44:27,287 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 50 treesize of output 43 [2021-03-10 23:44:27,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:27,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:27,303 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:44:27,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:44:27,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:27,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:27,517 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:44:27,518 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-03-10 23:44:27,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 82 [2021-03-10 23:44:27,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-03-10 23:44:27,871 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 23:44:27,872 INFO L628 ElimStorePlain]: treesize reduction 48, result has 62.2 percent of original size [2021-03-10 23:44:27,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:27,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:42, output treesize:161 [2021-03-10 23:44:28,374 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 23:44:28,874 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:44:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:28,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:28,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 23:44:28,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921356609] [2021-03-10 23:44:28,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:44:28,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:28,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:44:28,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:44:28,983 INFO L87 Difference]: Start difference. First operand 3557 states and 11709 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) [2021-03-10 23:44:29,356 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 21 [2021-03-10 23:44:29,621 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2021-03-10 23:44:29,892 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 23:44:30,827 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-03-10 23:44:31,138 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 41 [2021-03-10 23:44:31,425 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 23:44:31,909 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:44:32,230 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 23:44:32,557 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:44:33,660 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-03-10 23:44:34,702 WARN L205 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2021-03-10 23:44:35,066 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:44:35,564 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-10 23:44:35,950 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 23:44:36,620 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 23:44:37,305 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-10 23:44:38,135 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 23:44:38,358 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 23:44:38,668 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-10 23:44:38,970 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:44:39,568 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:44:39,762 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:44:40,942 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:44:42,539 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:44:42,951 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:44:43,463 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 23:44:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:44:43,552 INFO L93 Difference]: Finished difference Result 5170 states and 16610 transitions. [2021-03-10 23:44:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:44:43,555 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 [2021-03-10 23:44:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:44:43,563 INFO L225 Difference]: With dead ends: 5170 [2021-03-10 23:44:43,563 INFO L226 Difference]: Without dead ends: 5124 [2021-03-10 23:44:43,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 12851.3ms TimeCoverageRelationStatistics Valid=666, Invalid=3494, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:44:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2021-03-10 23:44:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 3514. [2021-03-10 23:44:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3513 states have (on average 3.2894961571306576) internal successors, (11556), 3513 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 11556 transitions. [2021-03-10 23:44:43,608 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 11556 transitions. Word has length 30 [2021-03-10 23:44:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:44:43,608 INFO L480 AbstractCegarLoop]: Abstraction has 3514 states and 11556 transitions. [2021-03-10 23:44:43,608 INFO L481 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) [2021-03-10 23:44:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 11556 transitions. [2021-03-10 23:44:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:44:43,611 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:44:43,611 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:44:43,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:44:43,812 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:44:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:44:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1097385304, now seen corresponding path program 51 times [2021-03-10 23:44:43,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:44:43,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428779877] [2021-03-10 23:44:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:44:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:44:44,177 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:44:44,335 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 23:44:44,514 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 23:44:44,706 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:44:44,983 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 23:44:45,150 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-03-10 23:44:45,341 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:44:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:45,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428779877] [2021-03-10 23:44:45,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710680812] [2021-03-10 23:44:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:44:45,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:44:45,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:44:45,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:44:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:44:46,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:46,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:46,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:46,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-03-10 23:44:46,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:44:46,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:44:46,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:44:46,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:44:46,769 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:44:46,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:44:46,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:44:46,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:19 [2021-03-10 23:44:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:44:47,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:44:47,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-03-10 23:44:47,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709183147] [2021-03-10 23:44:47,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:44:47,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:44:47,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:44:47,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:44:47,042 INFO L87 Difference]: Start difference. First operand 3514 states and 11556 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:44:48,129 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-03-10 23:44:48,309 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-10 23:44:48,847 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 23:44:49,061 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:44:49,354 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:44:49,667 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:44:50,161 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-10 23:44:50,378 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:44:50,724 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 23:44:51,057 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-10 23:44:51,309 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-10 23:44:51,862 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:44:52,094 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-10 23:44:52,300 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:44:52,630 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 23:44:52,926 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 23:44:53,637 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-03-10 23:44:54,040 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 23:44:55,112 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-10 23:44:56,107 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-03-10 23:44:56,335 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-03-10 23:44:56,912 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-10 23:44:57,419 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 23:44:57,839 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-03-10 23:44:58,294 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-03-10 23:44:58,750 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-03-10 23:44:59,162 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-03-10 23:45:00,556 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-10 23:45:01,790 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2021-03-10 23:45:02,822 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:45:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:45:03,885 INFO L93 Difference]: Finished difference Result 5147 states and 16262 transitions. [2021-03-10 23:45:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 23:45:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:45:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:45:03,897 INFO L225 Difference]: With dead ends: 5147 [2021-03-10 23:45:03,897 INFO L226 Difference]: Without dead ends: 5099 [2021-03-10 23:45:03,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 12803.3ms TimeCoverageRelationStatistics Valid=726, Invalid=5754, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 23:45:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-03-10 23:45:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 3521. [2021-03-10 23:45:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3521 states, 3520 states have (on average 3.288352272727273) internal successors, (11575), 3520 states have internal predecessors, (11575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3521 states to 3521 states and 11575 transitions. [2021-03-10 23:45:03,953 INFO L78 Accepts]: Start accepts. Automaton has 3521 states and 11575 transitions. Word has length 30 [2021-03-10 23:45:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:45:03,953 INFO L480 AbstractCegarLoop]: Abstraction has 3521 states and 11575 transitions. [2021-03-10 23:45:03,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3521 states and 11575 transitions. [2021-03-10 23:45:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:45:03,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:45:03,957 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:45:04,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:04,157 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:45:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:45:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1577862488, now seen corresponding path program 52 times [2021-03-10 23:45:04,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:45:04,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510720843] [2021-03-10 23:45:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:45:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:45:04,370 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:45:04,603 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:45:04,811 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 23:45:05,009 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 23:45:05,195 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-03-10 23:45:05,495 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 23:45:05,714 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-03-10 23:45:05,932 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:45:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:06,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510720843] [2021-03-10 23:45:06,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733568366] [2021-03-10 23:45:06,149 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 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 [2021-03-10 23:45:06,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:45:06,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:45:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:45:06,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:45:07,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:07,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:07,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:45:07,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:45:07,143 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 35 treesize of output 25 [2021-03-10 23:45:07,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:07,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:07,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:07,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:45:07,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:45:07,185 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 22 treesize of output 3 [2021-03-10 23:45:07,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:45:07,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:07,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:07,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:45:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:07,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:45:07,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-03-10 23:45:07,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881905967] [2021-03-10 23:45:07,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:45:07,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:45:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:45:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:45:07,331 INFO L87 Difference]: Start difference. First operand 3521 states and 11575 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:07,678 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:45:08,322 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:45:08,533 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-10 23:45:08,713 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:45:09,216 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 23:45:09,703 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:45:09,891 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-10 23:45:10,213 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:45:10,530 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:45:10,812 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:45:11,194 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 23:45:11,505 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:45:12,208 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 23:45:12,504 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-03-10 23:45:12,973 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:45:13,279 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:45:13,699 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:45:14,044 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:45:14,751 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:45:14,996 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:45:15,287 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 23:45:15,580 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-10 23:45:15,956 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 23:45:16,354 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 23:45:16,860 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:45:17,214 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:45:17,767 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:45:18,260 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 23:45:18,665 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-10 23:45:19,335 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 23:45:19,604 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 23:45:19,786 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:45:20,116 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-03-10 23:45:20,650 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:45:20,913 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 23:45:21,186 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 23:45:21,568 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:45:21,967 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 23:45:22,346 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-10 23:45:22,707 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-03-10 23:45:23,086 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-03-10 23:45:23,838 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:45:24,225 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:45:24,558 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:45:24,928 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:45:25,285 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:45:25,720 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:45:26,365 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 23:45:26,795 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-10 23:45:27,438 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-10 23:45:27,881 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:45:28,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:45:28,298 INFO L93 Difference]: Finished difference Result 4825 states and 15538 transitions. [2021-03-10 23:45:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-03-10 23:45:28,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:45:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:45:28,309 INFO L225 Difference]: With dead ends: 4825 [2021-03-10 23:45:28,309 INFO L226 Difference]: Without dead ends: 4803 [2021-03-10 23:45:28,310 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 17535.9ms TimeCoverageRelationStatistics Valid=1102, Invalid=7640, Unknown=0, NotChecked=0, Total=8742 [2021-03-10 23:45:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-03-10 23:45:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3525. [2021-03-10 23:45:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 3524 states have (on average 3.2874574347332577) internal successors, (11585), 3524 states have internal predecessors, (11585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 11585 transitions. [2021-03-10 23:45:28,353 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 11585 transitions. Word has length 30 [2021-03-10 23:45:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:45:28,353 INFO L480 AbstractCegarLoop]: Abstraction has 3525 states and 11585 transitions. [2021-03-10 23:45:28,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 11585 transitions. [2021-03-10 23:45:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:45:28,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:45:28,357 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:45:28,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-03-10 23:45:28,557 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:45:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:45:28,559 INFO L82 PathProgramCache]: Analyzing trace with hash 221140840, now seen corresponding path program 53 times [2021-03-10 23:45:28,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:45:28,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287976163] [2021-03-10 23:45:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:45:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:45:28,736 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:45:28,994 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:45:29,168 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:45:29,355 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:45:29,533 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:45:29,693 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2021-03-10 23:45:29,940 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 23:45:30,206 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:45:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:30,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287976163] [2021-03-10 23:45:30,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956572110] [2021-03-10 23:45:30,606 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 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 [2021-03-10 23:45:30,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:45:30,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:45:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:45:30,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:45:31,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:31,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:31,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:31,625 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 35 treesize of output 53 [2021-03-10 23:45:31,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:45:31,756 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:45:31,758 INFO L628 ElimStorePlain]: treesize reduction 44, result has 43.6 percent of original size [2021-03-10 23:45:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:31,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:45:31,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:45:31,778 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:45:31,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:31,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:31,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:19 [2021-03-10 23:45:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:32,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:45:32,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-03-10 23:45:32,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220876440] [2021-03-10 23:45:32,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:45:32,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:45:32,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:45:32,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:45:32,284 INFO L87 Difference]: Start difference. First operand 3525 states and 11585 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:32,713 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 23:45:33,085 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 16 [2021-03-10 23:45:33,734 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:45:34,027 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-03-10 23:45:34,872 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:45:35,400 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:45:35,743 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 23:45:36,211 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 23:45:36,708 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 23:45:36,981 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:45:38,325 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 23:45:38,669 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-03-10 23:45:39,387 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:45:40,084 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-03-10 23:45:40,467 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:45:40,806 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 23:45:41,183 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:45:41,611 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-03-10 23:45:42,048 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2021-03-10 23:45:42,280 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:45:42,569 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 23:45:43,139 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-03-10 23:45:43,585 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:45:44,376 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-10 23:45:44,937 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:45:45,226 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:45:45,499 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:45:46,115 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 23:45:46,840 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:45:47,402 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2021-03-10 23:45:47,738 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2021-03-10 23:45:48,342 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 23:45:48,887 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 23:45:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:45:49,098 INFO L93 Difference]: Finished difference Result 6298 states and 20123 transitions. [2021-03-10 23:45:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 23:45:49,103 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:45:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:45:49,112 INFO L225 Difference]: With dead ends: 6298 [2021-03-10 23:45:49,112 INFO L226 Difference]: Without dead ends: 6236 [2021-03-10 23:45:49,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 14250.5ms TimeCoverageRelationStatistics Valid=1016, Invalid=5626, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 23:45:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-03-10 23:45:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 3606. [2021-03-10 23:45:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 3.29625520110957) internal successors, (11883), 3605 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 11883 transitions. [2021-03-10 23:45:49,164 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 11883 transitions. Word has length 30 [2021-03-10 23:45:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:45:49,164 INFO L480 AbstractCegarLoop]: Abstraction has 3606 states and 11883 transitions. [2021-03-10 23:45:49,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:45:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 11883 transitions. [2021-03-10 23:45:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:45:49,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:45:49,168 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:45:49,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:45:49,368 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:45:49,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:45:49,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1655580810, now seen corresponding path program 54 times [2021-03-10 23:45:49,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:45:49,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519629833] [2021-03-10 23:45:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:45:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:45:49,557 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:45:49,787 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:45:49,981 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 23:45:50,206 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 23:45:50,445 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:45:50,665 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 23:45:50,996 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 23:45:51,162 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:45:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:51,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519629833] [2021-03-10 23:45:51,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138100878] [2021-03-10 23:45:51,458 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 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 [2021-03-10 23:45:51,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:45:51,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:45:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:45:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:45:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:52,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:52,803 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 35 treesize of output 51 [2021-03-10 23:45:52,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:45:52,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:52,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:45:52,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:45:52,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:45:52,879 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:45:52,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:45:52,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:45:52,918 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2021-03-10 23:45:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:45:53,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:45:53,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-03-10 23:45:53,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712126894] [2021-03-10 23:45:53,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:45:53,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:45:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:45:53,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:45:53,289 INFO L87 Difference]: Start difference. First operand 3606 states and 11883 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2021-03-10 23:45:53,985 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2021-03-10 23:45:54,213 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-03-10 23:45:54,646 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 23:45:54,924 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:45:55,169 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-10 23:45:55,623 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:45:55,871 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:45:56,404 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 23:45:56,889 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-10 23:45:57,143 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-10 23:45:57,447 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 23:45:57,749 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:45:58,636 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 23:45:58,894 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-03-10 23:45:59,597 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 23:45:59,919 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-10 23:46:00,596 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-03-10 23:46:00,922 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-10 23:46:01,170 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:46:01,619 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:46:01,972 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-10 23:46:02,706 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 23:46:03,271 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-10 23:46:03,576 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:46:03,974 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-03-10 23:46:04,436 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 23:46:04,714 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 23:46:05,015 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:46:05,385 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:46:05,847 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 23:46:06,085 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 23:46:06,556 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-10 23:46:07,263 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-03-10 23:46:07,728 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 23:46:08,136 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 23:46:08,545 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-10 23:46:09,101 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 23:46:09,546 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 23:46:10,071 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:46:10,469 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:46:10,772 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 23:46:11,814 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:46:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:46:12,953 INFO L93 Difference]: Finished difference Result 5172 states and 16403 transitions. [2021-03-10 23:46:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-10 23:46:12,957 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 [2021-03-10 23:46:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:46:12,963 INFO L225 Difference]: With dead ends: 5172 [2021-03-10 23:46:12,964 INFO L226 Difference]: Without dead ends: 5150 [2021-03-10 23:46:12,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 17315.2ms TimeCoverageRelationStatistics Valid=924, Invalid=6048, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:46:12,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-03-10 23:46:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 3623. [2021-03-10 23:46:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 3.3017669795692988) internal successors, (11959), 3622 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 11959 transitions. [2021-03-10 23:46:13,009 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 11959 transitions. Word has length 30 [2021-03-10 23:46:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:13,009 INFO L480 AbstractCegarLoop]: Abstraction has 3623 states and 11959 transitions. [2021-03-10 23:46:13,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2021-03-10 23:46:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 11959 transitions. [2021-03-10 23:46:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:46:13,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:13,013 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:13,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-03-10 23:46:13,214 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:13,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:13,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1167060122, now seen corresponding path program 55 times [2021-03-10 23:46:13,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:13,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504920021] [2021-03-10 23:46:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:13,384 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:46:13,642 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:46:13,821 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:46:14,007 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:46:14,188 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:46:14,376 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:46:14,541 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:46:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:14,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504920021] [2021-03-10 23:46:14,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903647730] [2021-03-10 23:46:14,990 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 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 [2021-03-10 23:46:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:46:15,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:46:16,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:16,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:16,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:16,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:16,154 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 35 treesize of output 25 [2021-03-10 23:46:16,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:16,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:16,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:16,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:16,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:16,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:16,197 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-03-10 23:46:16,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:16,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:16,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:16,222 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:46:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:16,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:46:16,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-03-10 23:46:16,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786661240] [2021-03-10 23:46:16,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:46:16,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:46:16,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:46:16,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:46:16,351 INFO L87 Difference]: Start difference. First operand 3623 states and 11959 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:16,759 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-03-10 23:46:17,776 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2021-03-10 23:46:18,949 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-03-10 23:46:20,627 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:46:21,202 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:46:21,423 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:46:21,918 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:46:22,478 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 23:46:22,677 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2021-03-10 23:46:22,946 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:46:23,325 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-10 23:46:23,557 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:46:24,401 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2021-03-10 23:46:24,664 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-03-10 23:46:27,898 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:46:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:46:28,294 INFO L93 Difference]: Finished difference Result 6162 states and 19532 transitions. [2021-03-10 23:46:28,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 23:46:28,298 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:46:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:46:28,307 INFO L225 Difference]: With dead ends: 6162 [2021-03-10 23:46:28,307 INFO L226 Difference]: Without dead ends: 6141 [2021-03-10 23:46:28,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 9396.5ms TimeCoverageRelationStatistics Valid=630, Invalid=4340, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:46:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6141 states. [2021-03-10 23:46:28,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6141 to 3757. [2021-03-10 23:46:28,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3757 states, 3756 states have (on average 3.297124600638978) internal successors, (12384), 3756 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 12384 transitions. [2021-03-10 23:46:28,370 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 12384 transitions. Word has length 30 [2021-03-10 23:46:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:28,370 INFO L480 AbstractCegarLoop]: Abstraction has 3757 states and 12384 transitions. [2021-03-10 23:46:28,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 12384 transitions. [2021-03-10 23:46:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:46:28,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:28,374 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:28,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:28,575 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:28,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:28,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1450431848, now seen corresponding path program 56 times [2021-03-10 23:46:28,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:28,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068688499] [2021-03-10 23:46:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:28,776 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 23:46:29,065 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-10 23:46:29,255 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:46:29,458 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:46:29,652 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:46:29,858 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:46:30,037 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:46:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:30,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068688499] [2021-03-10 23:46:30,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005775248] [2021-03-10 23:46:30,516 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 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 [2021-03-10 23:46:30,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:46:30,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:46:30,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:46:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:46:31,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:31,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:31,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:31,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-03-10 23:46:31,567 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:46:31,650 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-03-10 23:46:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:31,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:31,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:46:31,671 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:46:31,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:31,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:31,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2021-03-10 23:46:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:31,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:46:31,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-03-10 23:46:31,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305772989] [2021-03-10 23:46:31,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:46:31,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:46:31,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:46:31,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:46:31,964 INFO L87 Difference]: Start difference. First operand 3757 states and 12384 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:32,397 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-03-10 23:46:33,004 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-10 23:46:33,373 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-10 23:46:33,894 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-03-10 23:46:34,825 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 23:46:35,129 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:46:35,443 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:46:35,836 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:46:36,163 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 23:46:36,582 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:46:37,114 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:46:37,512 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:46:37,888 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 23:46:38,262 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:46:38,672 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:46:39,011 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 23:46:39,599 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:46:39,867 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 23:46:40,152 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 23:46:40,556 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-10 23:46:40,823 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 23:46:41,050 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:46:41,289 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:46:41,605 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-10 23:46:42,058 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:46:42,338 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:46:42,647 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:46:43,097 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:46:43,366 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:46:43,752 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 23:46:44,288 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 23:46:44,639 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:46:45,069 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:46:45,440 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:46:45,804 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-03-10 23:46:46,224 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 23:46:46,658 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 23:46:47,347 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:46:47,754 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 23:46:48,441 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:46:48,872 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-10 23:46:49,682 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-10 23:46:50,251 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:46:51,054 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 23:46:51,422 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 23:46:51,981 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:46:52,299 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:46:52,509 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:46:53,287 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 23:46:53,471 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:46:54,439 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:46:54,749 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:46:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:46:56,030 INFO L93 Difference]: Finished difference Result 6666 states and 21006 transitions. [2021-03-10 23:46:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-03-10 23:46:56,035 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:46:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:46:56,044 INFO L225 Difference]: With dead ends: 6666 [2021-03-10 23:46:56,044 INFO L226 Difference]: Without dead ends: 6618 [2021-03-10 23:46:56,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3542 ImplicationChecksByTransitivity, 19485.7ms TimeCoverageRelationStatistics Valid=1437, Invalid=9275, Unknown=0, NotChecked=0, Total=10712 [2021-03-10 23:46:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6618 states. [2021-03-10 23:46:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6618 to 3750. [2021-03-10 23:46:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 3749 states have (on average 3.2843424913310217) internal successors, (12313), 3749 states have internal predecessors, (12313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 12313 transitions. [2021-03-10 23:46:56,100 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 12313 transitions. Word has length 30 [2021-03-10 23:46:56,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:46:56,101 INFO L480 AbstractCegarLoop]: Abstraction has 3750 states and 12313 transitions. [2021-03-10 23:46:56,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:46:56,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 12313 transitions. [2021-03-10 23:46:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:46:56,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:46:56,105 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:46:56,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:46:56,305 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:46:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:46:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2092686276, now seen corresponding path program 57 times [2021-03-10 23:46:56,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:46:56,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824001301] [2021-03-10 23:46:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:46:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:46:56,518 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:46:56,757 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:46:56,962 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 23:46:57,196 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 23:46:57,426 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:46:57,640 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 23:46:57,914 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 23:46:58,087 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 23:46:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:58,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824001301] [2021-03-10 23:46:58,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199278372] [2021-03-10 23:46:58,392 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 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 [2021-03-10 23:46:58,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:46:58,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:46:58,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:46:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:46:59,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:59,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:59,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:59,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:59,694 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 35 treesize of output 25 [2021-03-10 23:46:59,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:59,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:59,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:59,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:46:59,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:59,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:46:59,740 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 22 treesize of output 3 [2021-03-10 23:46:59,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:46:59,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:46:59,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:46:59,767 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:46:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:46:59,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:46:59,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-03-10 23:46:59,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660161719] [2021-03-10 23:46:59,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:46:59,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:46:59,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:46:59,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:46:59,867 INFO L87 Difference]: Start difference. First operand 3750 states and 12313 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:00,946 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:47:01,158 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-03-10 23:47:01,536 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:47:01,780 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:47:02,463 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-10 23:47:02,809 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 23:47:03,072 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-10 23:47:03,407 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 23:47:03,720 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:47:04,271 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:47:04,917 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-10 23:47:05,924 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-10 23:47:06,252 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 23:47:06,488 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:47:06,899 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-03-10 23:47:07,840 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 23:47:08,089 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:47:08,437 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 23:47:08,757 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-10 23:47:09,049 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 23:47:09,396 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:47:09,949 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:47:10,507 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 23:47:10,849 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-03-10 23:47:11,598 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 23:47:12,122 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 23:47:12,413 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-10 23:47:13,402 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-03-10 23:47:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:47:14,631 INFO L93 Difference]: Finished difference Result 4925 states and 15749 transitions. [2021-03-10 23:47:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:47:14,635 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:47:14,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:47:14,643 INFO L225 Difference]: With dead ends: 4925 [2021-03-10 23:47:14,643 INFO L226 Difference]: Without dead ends: 4899 [2021-03-10 23:47:14,643 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 12452.8ms TimeCoverageRelationStatistics Valid=515, Invalid=4315, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 23:47:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-03-10 23:47:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 3752. [2021-03-10 23:47:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3752 states, 3751 states have (on average 3.2844574780058653) internal successors, (12320), 3751 states have internal predecessors, (12320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3752 states to 3752 states and 12320 transitions. [2021-03-10 23:47:14,687 INFO L78 Accepts]: Start accepts. Automaton has 3752 states and 12320 transitions. Word has length 30 [2021-03-10 23:47:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:47:14,687 INFO L480 AbstractCegarLoop]: Abstraction has 3752 states and 12320 transitions. [2021-03-10 23:47:14,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3752 states and 12320 transitions. [2021-03-10 23:47:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:47:14,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:47:14,691 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:47:14,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-03-10 23:47:14,893 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:47:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:47:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1487057440, now seen corresponding path program 58 times [2021-03-10 23:47:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:47:14,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869622023] [2021-03-10 23:47:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:47:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:47:15,106 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:47:15,361 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:47:15,571 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 23:47:15,804 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 23:47:16,050 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:47:16,412 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-03-10 23:47:16,646 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:47:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:16,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869622023] [2021-03-10 23:47:16,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403894081] [2021-03-10 23:47:16,854 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 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 [2021-03-10 23:47:16,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:47:16,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:47:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:47:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:47:17,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:17,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:17,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:17,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:17,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-03-10 23:47:17,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:17,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:17,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:17,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:17,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:17,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:17,837 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 22 treesize of output 3 [2021-03-10 23:47:17,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:17,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:17,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:47:17,864 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:47:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:18,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:47:18,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-03-10 23:47:18,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391372170] [2021-03-10 23:47:18,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:47:18,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:47:18,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:47:18,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:47:18,015 INFO L87 Difference]: Start difference. First operand 3752 states and 12320 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2021-03-10 23:47:18,385 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:47:18,887 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:47:19,141 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:47:19,350 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:47:19,599 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:47:20,305 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:47:20,799 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:47:21,192 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 23:47:21,602 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-10 23:47:22,181 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 23:47:22,449 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:47:22,900 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:47:23,186 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 23:47:23,664 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:47:24,022 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-10 23:47:24,335 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 23:47:24,647 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:47:25,045 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-10 23:47:25,442 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:47:25,854 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 23:47:26,163 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 23:47:26,671 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:47:26,885 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:47:27,334 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:47:27,731 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-03-10 23:47:28,158 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-10 23:47:28,508 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:47:29,239 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:47:29,556 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:47:30,140 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-10 23:47:30,371 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:47:30,812 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:47:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:47:31,409 INFO L93 Difference]: Finished difference Result 4716 states and 15180 transitions. [2021-03-10 23:47:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:47:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 [2021-03-10 23:47:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:47:31,422 INFO L225 Difference]: With dead ends: 4716 [2021-03-10 23:47:31,422 INFO L226 Difference]: Without dead ends: 4690 [2021-03-10 23:47:31,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 11428.6ms TimeCoverageRelationStatistics Valid=452, Invalid=3208, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:47:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2021-03-10 23:47:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 3728. [2021-03-10 23:47:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 3.2895089884625706) internal successors, (12260), 3727 states have internal predecessors, (12260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 12260 transitions. [2021-03-10 23:47:31,470 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 12260 transitions. Word has length 30 [2021-03-10 23:47:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:47:31,470 INFO L480 AbstractCegarLoop]: Abstraction has 3728 states and 12260 transitions. [2021-03-10 23:47:31,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2021-03-10 23:47:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 12260 transitions. [2021-03-10 23:47:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:47:31,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:47:31,474 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:47:31,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-03-10 23:47:31,677 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:47:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:47:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash -381039056, now seen corresponding path program 59 times [2021-03-10 23:47:31,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:47:31,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521837934] [2021-03-10 23:47:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:47:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:47:31,895 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:47:32,173 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:47:32,414 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 23:47:32,675 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 23:47:32,946 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:47:33,250 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:47:33,507 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:47:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:33,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521837934] [2021-03-10 23:47:33,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632123862] [2021-03-10 23:47:33,857 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 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 [2021-03-10 23:47:33,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:47:33,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:47:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:47:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:47:35,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:35,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:35,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:35,239 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 35 treesize of output 53 [2021-03-10 23:47:35,261 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-10 23:47:35,374 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-10 23:47:35,375 INFO L628 ElimStorePlain]: treesize reduction 54, result has 38.6 percent of original size [2021-03-10 23:47:35,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:35,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:35,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 23:47:35,398 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-03-10 23:47:35,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:35,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:47:35,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:19 [2021-03-10 23:47:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:35,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:47:35,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-03-10 23:47:35,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016122295] [2021-03-10 23:47:35,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:47:35,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:47:35,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:47:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:47:35,762 INFO L87 Difference]: Start difference. First operand 3728 states and 12260 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:36,247 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:47:36,550 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-03-10 23:47:36,905 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-03-10 23:47:37,134 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-03-10 23:47:37,539 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 23:47:37,814 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:47:38,642 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-03-10 23:47:38,923 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-10 23:47:39,295 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 23:47:39,629 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-10 23:47:40,269 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-10 23:47:40,557 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-03-10 23:47:41,143 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-10 23:47:42,099 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 23:47:42,785 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 23:47:43,680 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-10 23:47:44,212 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-03-10 23:47:44,782 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-10 23:47:45,279 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:47:46,143 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:47:46,925 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-03-10 23:47:47,269 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-03-10 23:47:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:47:49,725 INFO L93 Difference]: Finished difference Result 5217 states and 16575 transitions. [2021-03-10 23:47:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:47:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:47:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:47:49,739 INFO L225 Difference]: With dead ends: 5217 [2021-03-10 23:47:49,739 INFO L226 Difference]: Without dead ends: 5161 [2021-03-10 23:47:49,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 11046.9ms TimeCoverageRelationStatistics Valid=454, Invalid=3452, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:47:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-03-10 23:47:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 3728. [2021-03-10 23:47:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 3.288435739200429) internal successors, (12256), 3727 states have internal predecessors, (12256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 12256 transitions. [2021-03-10 23:47:49,790 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 12256 transitions. Word has length 30 [2021-03-10 23:47:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:47:49,790 INFO L480 AbstractCegarLoop]: Abstraction has 3728 states and 12256 transitions. [2021-03-10 23:47:49,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 12256 transitions. [2021-03-10 23:47:49,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:47:49,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:47:49,795 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:47:49,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:47:49,995 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:47:49,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:47:49,995 INFO L82 PathProgramCache]: Analyzing trace with hash 390656440, now seen corresponding path program 60 times [2021-03-10 23:47:49,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:47:49,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536566845] [2021-03-10 23:47:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:47:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:47:50,246 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:47:50,541 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:47:50,786 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 23:47:51,056 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 23:47:51,338 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:47:51,648 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:47:51,861 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 23:47:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:52,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536566845] [2021-03-10 23:47:52,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231804288] [2021-03-10 23:47:52,235 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 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 [2021-03-10 23:47:52,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:47:52,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:47:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:47:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:47:53,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:53,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:53,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:53,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:53,427 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 35 treesize of output 25 [2021-03-10 23:47:53,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:53,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:53,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:47:53,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:53,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:47:53,481 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 22 treesize of output 3 [2021-03-10 23:47:53,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:47:53,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:47:53,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:47:53,511 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:47:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:47:53,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:47:53,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-03-10 23:47:53,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605835815] [2021-03-10 23:47:53,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:47:53,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:47:53,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:47:53,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:47:53,629 INFO L87 Difference]: Start difference. First operand 3728 states and 12256 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:47:54,082 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:47:54,506 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:47:54,747 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:47:55,167 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:47:56,006 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:47:56,472 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:47:56,826 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 23:47:57,182 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-10 23:47:57,748 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:47:58,075 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 23:47:58,277 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:47:58,771 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:47:59,085 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-10 23:47:59,588 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:47:59,987 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-10 23:48:00,255 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:48:00,602 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-03-10 23:48:01,373 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:48:01,822 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 23:48:02,165 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 23:48:02,691 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 23:48:03,276 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:48:03,506 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:48:03,933 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:48:04,357 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-03-10 23:48:04,705 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-03-10 23:48:05,062 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:48:05,368 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-10 23:48:05,993 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:48:06,368 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:48:06,832 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 23:48:07,058 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-10 23:48:07,470 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-03-10 23:48:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:48:08,160 INFO L93 Difference]: Finished difference Result 4720 states and 15185 transitions. [2021-03-10 23:48:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:48:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:48:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:48:08,173 INFO L225 Difference]: With dead ends: 4720 [2021-03-10 23:48:08,173 INFO L226 Difference]: Without dead ends: 4694 [2021-03-10 23:48:08,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 12853.7ms TimeCoverageRelationStatistics Valid=538, Invalid=3752, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:48:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2021-03-10 23:48:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 3720. [2021-03-10 23:48:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 3719 states have (on average 3.2901317558483463) internal successors, (12236), 3719 states have internal predecessors, (12236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 12236 transitions. [2021-03-10 23:48:08,219 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 12236 transitions. Word has length 30 [2021-03-10 23:48:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:48:08,219 INFO L480 AbstractCegarLoop]: Abstraction has 3720 states and 12236 transitions. [2021-03-10 23:48:08,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 12236 transitions. [2021-03-10 23:48:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:48:08,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:48:08,223 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:48:08,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:48:08,424 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:48:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:48:08,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2083644736, now seen corresponding path program 61 times [2021-03-10 23:48:08,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:48:08,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514479445] [2021-03-10 23:48:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:48:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:48:08,658 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:48:08,933 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:48:09,174 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 23:48:09,425 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:48:09,755 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-03-10 23:48:10,180 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 23:48:10,433 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-03-10 23:48:10,699 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:48:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:10,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514479445] [2021-03-10 23:48:10,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782295206] [2021-03-10 23:48:10,911 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 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 [2021-03-10 23:48:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:48:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:48:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:48:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:12,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:48:12,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:48:12,054 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 35 treesize of output 25 [2021-03-10 23:48:12,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:12,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:12,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:12,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:48:12,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:48:12,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2021-03-10 23:48:12,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:12,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:12,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:48:12,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:48:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:12,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:48:12,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-03-10 23:48:12,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764875236] [2021-03-10 23:48:12,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:48:12,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:48:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:48:12,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:48:12,321 INFO L87 Difference]: Start difference. First operand 3720 states and 12236 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2021-03-10 23:48:12,750 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:48:12,913 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-10 23:48:13,329 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:48:13,611 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-03-10 23:48:13,859 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:48:14,191 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-10 23:48:14,666 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-10 23:48:15,101 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 23:48:15,388 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:48:15,787 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:48:16,176 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:48:16,776 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-10 23:48:17,363 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-03-10 23:48:17,687 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 23:48:17,973 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:48:18,379 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 23:48:18,836 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 23:48:19,126 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-03-10 23:48:19,700 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-03-10 23:48:20,031 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 23:48:20,502 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 23:48:20,932 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-03-10 23:48:21,511 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 23:48:22,018 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-03-10 23:48:22,486 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:48:22,997 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 23:48:23,420 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:48:23,769 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:48:24,317 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-03-10 23:48:24,827 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:48:25,109 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-03-10 23:48:25,519 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:48:26,078 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-10 23:48:26,681 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:48:27,317 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 23:48:27,629 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:48:28,094 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-10 23:48:29,062 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:48:29,314 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:48:29,701 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:48:30,005 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:48:30,573 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 23:48:31,087 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:48:31,375 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-10 23:48:32,000 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 23:48:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:48:32,395 INFO L93 Difference]: Finished difference Result 4962 states and 15836 transitions. [2021-03-10 23:48:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 23:48:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 [2021-03-10 23:48:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:48:32,407 INFO L225 Difference]: With dead ends: 4962 [2021-03-10 23:48:32,408 INFO L226 Difference]: Without dead ends: 4940 [2021-03-10 23:48:32,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 18177.5ms TimeCoverageRelationStatistics Valid=768, Invalid=4782, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 23:48:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4940 states. [2021-03-10 23:48:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4940 to 3702. [2021-03-10 23:48:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3701 states have (on average 3.2928938124831126) internal successors, (12187), 3701 states have internal predecessors, (12187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 12187 transitions. [2021-03-10 23:48:32,456 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 12187 transitions. Word has length 30 [2021-03-10 23:48:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:48:32,456 INFO L480 AbstractCegarLoop]: Abstraction has 3702 states and 12187 transitions. [2021-03-10 23:48:32,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2021-03-10 23:48:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 12187 transitions. [2021-03-10 23:48:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:48:32,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:48:32,462 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:48:32,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:48:32,677 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:48:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:48:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1617231264, now seen corresponding path program 62 times [2021-03-10 23:48:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:48:32,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552771490] [2021-03-10 23:48:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:48:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:48:32,942 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:48:33,195 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:48:33,409 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 23:48:33,642 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:48:33,900 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:48:34,138 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-10 23:48:34,440 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 23:48:34,639 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 23:48:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:34,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552771490] [2021-03-10 23:48:34,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552052789] [2021-03-10 23:48:34,975 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 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 [2021-03-10 23:48:34,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:48:34,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:48:34,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:48:34,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:48:36,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:36,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:36,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:48:36,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:48:36,250 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 35 treesize of output 25 [2021-03-10 23:48:36,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:36,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:36,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:48:36,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:48:36,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:48:36,302 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 22 treesize of output 3 [2021-03-10 23:48:36,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:48:36,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:48:36,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:48:36,332 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:3 [2021-03-10 23:48:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:48:36,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:48:36,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-03-10 23:48:36,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862497515] [2021-03-10 23:48:36,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:48:36,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:48:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:48:36,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:48:36,445 INFO L87 Difference]: Start difference. First operand 3702 states and 12187 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:48:36,958 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-03-10 23:48:37,229 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-03-10 23:48:37,479 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-03-10 23:48:37,864 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-10 23:48:38,125 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:48:38,399 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:48:38,908 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-10 23:48:39,222 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 23:48:39,497 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-03-10 23:48:39,844 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:48:40,318 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:48:40,675 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 23:48:40,986 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-10 23:48:41,334 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 23:48:41,742 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:48:42,101 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-10 23:48:42,782 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-03-10 23:48:43,510 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-10 23:48:43,859 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 23:48:44,229 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-10 23:48:44,501 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:48:44,813 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-03-10 23:48:45,617 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 23:48:46,155 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 23:48:46,585 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-03-10 23:48:46,945 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 23:48:47,234 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-10 23:48:47,551 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-10 23:48:47,858 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 23:48:48,465 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:48:49,001 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:48:49,444 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-03-10 23:48:49,996 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 23:48:50,350 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 23:48:50,719 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 23:48:51,067 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-10 23:48:51,391 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-10 23:48:51,959 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:48:52,826 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 23:48:53,492 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-03-10 23:48:53,877 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 23:48:54,217 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-03-10 23:48:54,739 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:48:55,747 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-03-10 23:48:56,178 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-03-10 23:48:57,310 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-03-10 23:48:58,018 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 23:48:59,294 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 23:48:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:48:59,584 INFO L93 Difference]: Finished difference Result 4899 states and 15721 transitions. [2021-03-10 23:48:59,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-10 23:48:59,589 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-03-10 23:48:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:48:59,596 INFO L225 Difference]: With dead ends: 4899 [2021-03-10 23:48:59,596 INFO L226 Difference]: Without dead ends: 4873 [2021-03-10 23:48:59,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 18487.5ms TimeCoverageRelationStatistics Valid=663, Invalid=5657, Unknown=0, NotChecked=0, Total=6320 [2021-03-10 23:48:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2021-03-10 23:48:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 3689. [2021-03-10 23:48:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3688 states have (on average 3.293655097613883) internal successors, (12147), 3688 states have internal predecessors, (12147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:48:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 12147 transitions. [2021-03-10 23:48:59,640 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 12147 transitions. Word has length 30 [2021-03-10 23:48:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:48:59,640 INFO L480 AbstractCegarLoop]: Abstraction has 3689 states and 12147 transitions. [2021-03-10 23:48:59,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-03-10 23:48:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 12147 transitions. [2021-03-10 23:48:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:48:59,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:48:59,644 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:48:59,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-03-10 23:48:59,844 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:48:59,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:48:59,844 INFO L82 PathProgramCache]: Analyzing trace with hash -363960411, now seen corresponding path program 48 times [2021-03-10 23:48:59,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:48:59,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560686049] [2021-03-10 23:48:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:48:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:49:00,110 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:00,252 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:00,533 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:49:00,816 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 23:49:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:01,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560686049] [2021-03-10 23:49:01,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631281148] [2021-03-10 23:49:01,098 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 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 [2021-03-10 23:49:01,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:49:01,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:49:01,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:49:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:49:02,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:49:02,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:49:02,554 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 31 treesize of output 23 [2021-03-10 23:49:02,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:49:02,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:02,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:49:02,597 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 12 treesize of output 3 [2021-03-10 23:49:02,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:49:02,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:02,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:49:02,630 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:49:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:02,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:49:02,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:49:02,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916986435] [2021-03-10 23:49:02,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:49:02,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:49:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:49:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:49:02,737 INFO L87 Difference]: Start difference. First operand 3689 states and 12147 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) [2021-03-10 23:49:03,340 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:49:03,833 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 23:49:04,464 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 23:49:04,664 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:05,049 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-10 23:49:05,576 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-03-10 23:49:05,982 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 23:49:07,195 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:49:07,670 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 23:49:09,123 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:49:10,331 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 23:49:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:49:11,138 INFO L93 Difference]: Finished difference Result 4758 states and 15377 transitions. [2021-03-10 23:49:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:49:11,144 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 [2021-03-10 23:49:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:49:11,152 INFO L225 Difference]: With dead ends: 4758 [2021-03-10 23:49:11,152 INFO L226 Difference]: Without dead ends: 4739 [2021-03-10 23:49:11,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 6665.9ms TimeCoverageRelationStatistics Valid=264, Invalid=1806, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:49:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2021-03-10 23:49:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 3681. [2021-03-10 23:49:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3680 states have (on average 3.2932065217391306) internal successors, (12119), 3680 states have internal predecessors, (12119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 12119 transitions. [2021-03-10 23:49:11,200 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 12119 transitions. Word has length 30 [2021-03-10 23:49:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:49:11,200 INFO L480 AbstractCegarLoop]: Abstraction has 3681 states and 12119 transitions. [2021-03-10 23:49:11,200 INFO L481 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) [2021-03-10 23:49:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 12119 transitions. [2021-03-10 23:49:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:49:11,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:49:11,204 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:49:11,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-03-10 23:49:11,419 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:49:11,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:49:11,419 INFO L82 PathProgramCache]: Analyzing trace with hash -419041337, now seen corresponding path program 49 times [2021-03-10 23:49:11,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:49:11,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235563440] [2021-03-10 23:49:11,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:49:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:49:11,704 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:11,866 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:12,180 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:49:12,491 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 23:49:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:12,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235563440] [2021-03-10 23:49:12,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789390607] [2021-03-10 23:49:12,816 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 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 [2021-03-10 23:49:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:49:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:49:12,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:49:14,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:49:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:49:14,477 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 31 treesize of output 23 [2021-03-10 23:49:14,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:49:14,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:14,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:49:14,539 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 12 treesize of output 3 [2021-03-10 23:49:14,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:49:14,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:14,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:49:14,584 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:49:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:14,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:49:14,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 23:49:14,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155685646] [2021-03-10 23:49:14,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:49:14,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:49:14,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:49:14,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:49:14,731 INFO L87 Difference]: Start difference. First operand 3681 states and 12119 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:15,147 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 23:49:15,434 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 23:49:15,743 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:49:16,403 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-10 23:49:16,622 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:49:17,037 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:49:17,968 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 23:49:18,740 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 23:49:20,324 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 23:49:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:49:21,395 INFO L93 Difference]: Finished difference Result 4685 states and 15257 transitions. [2021-03-10 23:49:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:49:21,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:49:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:49:21,408 INFO L225 Difference]: With dead ends: 4685 [2021-03-10 23:49:21,408 INFO L226 Difference]: Without dead ends: 4670 [2021-03-10 23:49:21,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 6035.3ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:49:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4670 states. [2021-03-10 23:49:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4670 to 3685. [2021-03-10 23:49:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3685 states, 3684 states have (on average 3.293973941368078) internal successors, (12135), 3684 states have internal predecessors, (12135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3685 states to 3685 states and 12135 transitions. [2021-03-10 23:49:21,454 INFO L78 Accepts]: Start accepts. Automaton has 3685 states and 12135 transitions. Word has length 30 [2021-03-10 23:49:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:49:21,454 INFO L480 AbstractCegarLoop]: Abstraction has 3685 states and 12135 transitions. [2021-03-10 23:49:21,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3685 states and 12135 transitions. [2021-03-10 23:49:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:49:21,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:49:21,458 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:49:21,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-03-10 23:49:21,659 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:49:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:49:21,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1386506799, now seen corresponding path program 50 times [2021-03-10 23:49:21,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:49:21,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882029467] [2021-03-10 23:49:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:49:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:49:21,937 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:22,085 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:22,366 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:49:22,658 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 23:49:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:22,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882029467] [2021-03-10 23:49:22,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39100062] [2021-03-10 23:49:22,995 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 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 [2021-03-10 23:49:23,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:49:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:49:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:49:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:49:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:49:23,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:49:24,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:24,012 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 37 treesize of output 37 [2021-03-10 23:49:24,021 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:49:24,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:24,078 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 13 treesize of output 7 [2021-03-10 23:49:24,090 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:49:24,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:24,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:49:24,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-03-10 23:49:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:24,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:49:24,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:49:24,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312402780] [2021-03-10 23:49:24,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:49:24,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:49:24,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:49:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:49:24,566 INFO L87 Difference]: Start difference. First operand 3685 states and 12135 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) [2021-03-10 23:49:25,283 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:49:25,683 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:49:25,907 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 18 [2021-03-10 23:49:26,666 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-10 23:49:26,864 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:27,206 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:49:27,821 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-03-10 23:49:28,276 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 23:49:29,047 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:49:30,308 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-10 23:49:31,027 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 23:49:31,474 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 23:49:32,050 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 23:49:32,550 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:49:33,023 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:49:33,446 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:49:33,917 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 23:49:35,221 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:49:35,652 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:49:35,994 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:49:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:49:36,178 INFO L93 Difference]: Finished difference Result 5439 states and 17647 transitions. [2021-03-10 23:49:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:49:36,184 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 [2021-03-10 23:49:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:49:36,191 INFO L225 Difference]: With dead ends: 5439 [2021-03-10 23:49:36,191 INFO L226 Difference]: Without dead ends: 5414 [2021-03-10 23:49:36,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 9563.7ms TimeCoverageRelationStatistics Valid=504, Invalid=2576, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:49:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2021-03-10 23:49:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 3653. [2021-03-10 23:49:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.289156626506024) internal successors, (12012), 3652 states have internal predecessors, (12012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 12012 transitions. [2021-03-10 23:49:36,240 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 12012 transitions. Word has length 30 [2021-03-10 23:49:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:49:36,240 INFO L480 AbstractCegarLoop]: Abstraction has 3653 states and 12012 transitions. [2021-03-10 23:49:36,240 INFO L481 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) [2021-03-10 23:49:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 12012 transitions. [2021-03-10 23:49:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:49:36,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:49:36,244 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:49:36,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:49:36,444 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:49:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:49:36,444 INFO L82 PathProgramCache]: Analyzing trace with hash 335229075, now seen corresponding path program 51 times [2021-03-10 23:49:36,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:49:36,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131794138] [2021-03-10 23:49:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:49:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:49:36,699 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:36,844 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:37,115 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:49:37,397 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 23:49:37,664 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:49:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:37,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131794138] [2021-03-10 23:49:37,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033425455] [2021-03-10 23:49:37,876 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 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 [2021-03-10 23:49:37,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:49:37,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:49:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:49:37,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:49:39,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:49:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:49:39,302 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 31 treesize of output 23 [2021-03-10 23:49:39,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:49:39,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:39,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:49:39,360 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 12 treesize of output 3 [2021-03-10 23:49:39,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:49:39,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:39,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:49:39,399 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:49:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:39,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:49:39,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 23:49:39,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339049685] [2021-03-10 23:49:39,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:49:39,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:49:39,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:49:39,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:49:39,544 INFO L87 Difference]: Start difference. First operand 3653 states and 12012 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:40,164 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-03-10 23:49:40,887 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 23:49:41,092 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:49:41,484 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-10 23:49:42,517 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 23:49:43,313 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:49:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:49:45,286 INFO L93 Difference]: Finished difference Result 4656 states and 15066 transitions. [2021-03-10 23:49:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:49:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:49:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:49:45,298 INFO L225 Difference]: With dead ends: 4656 [2021-03-10 23:49:45,298 INFO L226 Difference]: Without dead ends: 4635 [2021-03-10 23:49:45,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 5289.5ms TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:49:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-03-10 23:49:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3620. [2021-03-10 23:49:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 3.2879248411163307) internal successors, (11899), 3619 states have internal predecessors, (11899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 11899 transitions. [2021-03-10 23:49:45,340 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 11899 transitions. Word has length 30 [2021-03-10 23:49:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:49:45,341 INFO L480 AbstractCegarLoop]: Abstraction has 3620 states and 11899 transitions. [2021-03-10 23:49:45,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 11899 transitions. [2021-03-10 23:49:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:49:45,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:49:45,344 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:49:45,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-03-10 23:49:45,545 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:49:45,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:49:45,545 INFO L82 PathProgramCache]: Analyzing trace with hash 613004947, now seen corresponding path program 52 times [2021-03-10 23:49:45,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:49:45,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129300374] [2021-03-10 23:49:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:49:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:49:45,795 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:45,937 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:46,237 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:49:46,531 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-10 23:49:46,795 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:49:47,018 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:49:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:47,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129300374] [2021-03-10 23:49:47,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067131260] [2021-03-10 23:49:47,238 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 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 [2021-03-10 23:49:47,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:49:47,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:49:47,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:49:47,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:49:48,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:49:48,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:48,223 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 31 treesize of output 39 [2021-03-10 23:49:48,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:49:48,346 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:49:48,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:48,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:49:48,360 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 23:49:48,371 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:49:48,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:48,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:49:48,490 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:49:48,490 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 28 [2021-03-10 23:49:48,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 23:49:48,600 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:49:48,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:49:48,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:49:48,615 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:57 [2021-03-10 23:49:48,847 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:49:49,287 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:49:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:49:49,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:49:49,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-03-10 23:49:49,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885791706] [2021-03-10 23:49:49,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:49:49,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:49:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:49:49,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:49:49,460 INFO L87 Difference]: Start difference. First operand 3620 states and 11899 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:50,041 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-03-10 23:49:50,869 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-10 23:49:51,071 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:49:51,508 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2021-03-10 23:49:52,247 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 23:49:52,992 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-03-10 23:49:53,555 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-03-10 23:49:54,187 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 22 [2021-03-10 23:49:54,696 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-03-10 23:49:55,174 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 23:49:55,492 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:49:56,476 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2021-03-10 23:49:57,478 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:49:58,062 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 23:49:58,583 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:49:58,966 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-03-10 23:49:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:49:59,196 INFO L93 Difference]: Finished difference Result 5213 states and 16857 transitions. [2021-03-10 23:49:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:49:59,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:49:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:49:59,211 INFO L225 Difference]: With dead ends: 5213 [2021-03-10 23:49:59,211 INFO L226 Difference]: Without dead ends: 5163 [2021-03-10 23:49:59,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 9433.4ms TimeCoverageRelationStatistics Valid=436, Invalid=1726, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:49:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2021-03-10 23:49:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 3580. [2021-03-10 23:49:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 3.290304554344789) internal successors, (11776), 3579 states have internal predecessors, (11776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 11776 transitions. [2021-03-10 23:49:59,260 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 11776 transitions. Word has length 30 [2021-03-10 23:49:59,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:49:59,260 INFO L480 AbstractCegarLoop]: Abstraction has 3580 states and 11776 transitions. [2021-03-10 23:49:59,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:49:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 11776 transitions. [2021-03-10 23:49:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:49:59,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:49:59,264 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:49:59,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:49:59,464 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:49:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:49:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1635991491, now seen corresponding path program 53 times [2021-03-10 23:49:59,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:49:59,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332781810] [2021-03-10 23:49:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:49:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:49:59,754 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:49:59,914 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:00,225 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:50:00,525 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:50:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:00,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332781810] [2021-03-10 23:50:00,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779275041] [2021-03-10 23:50:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:50:00,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:50:00,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:50:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:50:00,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:50:03,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:50:03,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:50:03,157 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 31 treesize of output 23 [2021-03-10 23:50:03,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:03,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:03,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:50:03,204 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 12 treesize of output 3 [2021-03-10 23:50:03,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:03,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:03,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:50:03,238 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:50:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:03,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:50:03,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 23:50:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214686758] [2021-03-10 23:50:03,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:50:03,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:50:03,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:50:03,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:50:03,362 INFO L87 Difference]: Start difference. First operand 3580 states and 11776 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:03,942 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 23:50:04,173 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-03-10 23:50:04,530 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 23:50:05,102 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:50:05,324 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-10 23:50:05,734 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 23:50:06,404 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-10 23:50:06,660 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:50:08,899 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 23:50:09,712 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:50:10,458 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:50:10,916 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 23:50:11,246 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:50:12,525 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:50:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:50:13,653 INFO L93 Difference]: Finished difference Result 4766 states and 15385 transitions. [2021-03-10 23:50:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:50:13,666 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:50:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:50:13,673 INFO L225 Difference]: With dead ends: 4766 [2021-03-10 23:50:13,673 INFO L226 Difference]: Without dead ends: 4751 [2021-03-10 23:50:13,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 8367.6ms TimeCoverageRelationStatistics Valid=434, Invalid=2646, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:50:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-03-10 23:50:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3592. [2021-03-10 23:50:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 3.2923976608187133) internal successors, (11823), 3591 states have internal predecessors, (11823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 11823 transitions. [2021-03-10 23:50:13,716 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 11823 transitions. Word has length 30 [2021-03-10 23:50:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:50:13,716 INFO L480 AbstractCegarLoop]: Abstraction has 3592 states and 11823 transitions. [2021-03-10 23:50:13,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 11823 transitions. [2021-03-10 23:50:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:50:13,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:50:13,720 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:50:13,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-03-10 23:50:13,921 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:50:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:50:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash 936195115, now seen corresponding path program 54 times [2021-03-10 23:50:13,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:50:13,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093100440] [2021-03-10 23:50:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:50:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:50:14,229 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:14,416 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:14,743 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-03-10 23:50:15,055 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:50:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:15,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093100440] [2021-03-10 23:50:15,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184733615] [2021-03-10 23:50:15,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:50:15,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:50:15,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:50:15,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:50:15,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:50:16,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:50:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:50:16,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:16,619 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 37 treesize of output 37 [2021-03-10 23:50:16,629 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:50:16,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:16,689 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 13 treesize of output 7 [2021-03-10 23:50:16,703 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:50:16,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:16,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:50:16,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-03-10 23:50:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:17,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:50:17,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:50:17,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036000775] [2021-03-10 23:50:17,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:50:17,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:50:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:50:17,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:50:17,196 INFO L87 Difference]: Start difference. First operand 3592 states and 11823 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) [2021-03-10 23:50:17,861 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 23:50:18,174 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:50:18,426 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 18 [2021-03-10 23:50:19,038 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:50:19,256 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:20,167 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-03-10 23:50:20,679 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 23:50:21,531 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-10 23:50:22,179 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:50:23,089 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 23:50:23,432 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 23:50:23,802 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-03-10 23:50:24,412 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:50:25,178 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 23:50:25,632 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:50:26,016 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:50:27,137 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:50:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:50:27,523 INFO L93 Difference]: Finished difference Result 5317 states and 17252 transitions. [2021-03-10 23:50:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:50:27,529 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 [2021-03-10 23:50:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:50:27,537 INFO L225 Difference]: With dead ends: 5317 [2021-03-10 23:50:27,537 INFO L226 Difference]: Without dead ends: 5292 [2021-03-10 23:50:27,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 8701.7ms TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:50:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5292 states. [2021-03-10 23:50:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5292 to 3553. [2021-03-10 23:50:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 3552 states have (on average 3.28856981981982) internal successors, (11681), 3552 states have internal predecessors, (11681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 11681 transitions. [2021-03-10 23:50:27,587 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 11681 transitions. Word has length 30 [2021-03-10 23:50:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:50:27,587 INFO L480 AbstractCegarLoop]: Abstraction has 3553 states and 11681 transitions. [2021-03-10 23:50:27,587 INFO L481 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) [2021-03-10 23:50:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 11681 transitions. [2021-03-10 23:50:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:50:27,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:50:27,591 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:50:27,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:50:27,791 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:50:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:50:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash -940120959, now seen corresponding path program 55 times [2021-03-10 23:50:27,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:50:27,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49112812] [2021-03-10 23:50:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:50:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:50:28,070 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:28,231 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:28,639 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:50:28,928 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:50:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:29,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49112812] [2021-03-10 23:50:29,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18318134] [2021-03-10 23:50:29,177 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 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 [2021-03-10 23:50:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:50:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:50:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:50:30,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:50:30,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:50:30,920 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 31 treesize of output 23 [2021-03-10 23:50:30,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:30,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:30,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:50:30,988 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 12 treesize of output 3 [2021-03-10 23:50:30,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:31,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:31,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:50:31,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:3 [2021-03-10 23:50:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:31,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:50:31,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 23:50:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803036365] [2021-03-10 23:50:31,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:50:31,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:50:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:50:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:50:31,167 INFO L87 Difference]: Start difference. First operand 3553 states and 11681 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) [2021-03-10 23:50:31,499 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:50:31,789 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 23:50:32,326 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:50:32,565 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:50:33,330 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:50:35,647 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:50:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:50:36,308 INFO L93 Difference]: Finished difference Result 4636 states and 15021 transitions. [2021-03-10 23:50:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:50:36,314 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 [2021-03-10 23:50:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:50:36,321 INFO L225 Difference]: With dead ends: 4636 [2021-03-10 23:50:36,321 INFO L226 Difference]: Without dead ends: 4615 [2021-03-10 23:50:36,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 4397.3ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:50:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2021-03-10 23:50:36,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 3661. [2021-03-10 23:50:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3661 states, 3660 states have (on average 3.2882513661202184) internal successors, (12035), 3660 states have internal predecessors, (12035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 12035 transitions. [2021-03-10 23:50:36,366 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 12035 transitions. Word has length 30 [2021-03-10 23:50:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:50:36,366 INFO L480 AbstractCegarLoop]: Abstraction has 3661 states and 12035 transitions. [2021-03-10 23:50:36,366 INFO L481 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) [2021-03-10 23:50:36,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 12035 transitions. [2021-03-10 23:50:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:50:36,370 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:50:36,370 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:50:36,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:50:36,570 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:50:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:50:36,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1199849611, now seen corresponding path program 56 times [2021-03-10 23:50:36,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:50:36,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091517610] [2021-03-10 23:50:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:50:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:50:36,818 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:50:36,972 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-10 23:50:37,109 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-03-10 23:50:37,399 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 23:50:37,709 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:50:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:38,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091517610] [2021-03-10 23:50:38,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042381094] [2021-03-10 23:50:38,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:50:38,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:50:38,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:50:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:50:38,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:50:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:50:39,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:39,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-03-10 23:50:39,810 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:50:39,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:39,885 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 [2021-03-10 23:50:39,898 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:50:39,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:39,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:50:39,978 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:19 [2021-03-10 23:50:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:40,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:50:40,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 23:50:40,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057709887] [2021-03-10 23:50:40,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:50:40,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:50:40,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:50:40,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:50:40,352 INFO L87 Difference]: Start difference. First operand 3661 states and 12035 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) [2021-03-10 23:50:40,904 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-03-10 23:50:41,531 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:42,273 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-03-10 23:50:42,986 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 23:50:44,000 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-03-10 23:50:44,631 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:50:45,214 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:50:45,437 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 23:50:46,393 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:50:47,650 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:50:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:50:48,437 INFO L93 Difference]: Finished difference Result 4602 states and 14875 transitions. [2021-03-10 23:50:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:50:48,444 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 [2021-03-10 23:50:48,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:50:48,451 INFO L225 Difference]: With dead ends: 4602 [2021-03-10 23:50:48,451 INFO L226 Difference]: Without dead ends: 4568 [2021-03-10 23:50:48,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 6494.4ms TimeCoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:50:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4568 states. [2021-03-10 23:50:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4568 to 3655. [2021-03-10 23:50:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3654 states have (on average 3.287903667214012) internal successors, (12014), 3654 states have internal predecessors, (12014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 12014 transitions. [2021-03-10 23:50:48,497 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 12014 transitions. Word has length 30 [2021-03-10 23:50:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:50:48,497 INFO L480 AbstractCegarLoop]: Abstraction has 3655 states and 12014 transitions. [2021-03-10 23:50:48,497 INFO L481 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) [2021-03-10 23:50:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 12014 transitions. [2021-03-10 23:50:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:50:48,501 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:50:48,501 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:50:48,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-03-10 23:50:48,702 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:50:48,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:50:48,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2035417503, now seen corresponding path program 57 times [2021-03-10 23:50:48,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:50:48,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044525094] [2021-03-10 23:50:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:50:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:50:48,998 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:49,161 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:49,578 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:50:49,856 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:50:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044525094] [2021-03-10 23:50:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854820080] [2021-03-10 23:50:50,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:50:50,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:50:50,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:50:50,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:50:50,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:50:51,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:50:51,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:51,455 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 31 treesize of output 39 [2021-03-10 23:50:51,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:50:51,601 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 23:50:51,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:51,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:50:51,617 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:50:51,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:50:51,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:51,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:50:51,770 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:50:51,770 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 28 [2021-03-10 23:50:51,780 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:50:51,920 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:50:51,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:50:51,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:50:51,947 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:47, output treesize:56 [2021-03-10 23:50:52,339 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:50:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:50:52,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:50:52,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 23:50:52,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081425836] [2021-03-10 23:50:52,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:50:52,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:50:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:50:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:50:52,552 INFO L87 Difference]: Start difference. First operand 3655 states and 12014 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:53,092 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-03-10 23:50:53,731 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-10 23:50:53,931 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:50:54,200 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:50:54,657 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:50:55,697 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:50:56,279 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:50:57,739 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 23:50:58,165 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-03-10 23:50:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:50:58,428 INFO L93 Difference]: Finished difference Result 5462 states and 17606 transitions. [2021-03-10 23:50:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:50:58,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:50:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:50:58,442 INFO L225 Difference]: With dead ends: 5462 [2021-03-10 23:50:58,442 INFO L226 Difference]: Without dead ends: 5412 [2021-03-10 23:50:58,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 5852.8ms TimeCoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:50:58,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5412 states. [2021-03-10 23:50:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5412 to 3647. [2021-03-10 23:50:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3646 states have (on average 3.284421283598464) internal successors, (11975), 3646 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 11975 transitions. [2021-03-10 23:50:58,493 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 11975 transitions. Word has length 30 [2021-03-10 23:50:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:50:58,493 INFO L480 AbstractCegarLoop]: Abstraction has 3647 states and 11975 transitions. [2021-03-10 23:50:58,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:50:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 11975 transitions. [2021-03-10 23:50:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:50:58,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:50:58,497 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:50:58,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:50:58,698 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:50:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:50:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash -173824399, now seen corresponding path program 58 times [2021-03-10 23:50:58,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:50:58,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723032837] [2021-03-10 23:50:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:50:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:50:58,987 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:59,150 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:50:59,287 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:50:59,585 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:50:59,892 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:51:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:00,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723032837] [2021-03-10 23:51:00,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581957130] [2021-03-10 23:51:00,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:51:00,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:51:00,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:51:00,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:51:00,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:51:01,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:01,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:01,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-03-10 23:51:01,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:51:01,598 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:51:01,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:01,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:51:01,617 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-03-10 23:51:01,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:01,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:01,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:01,783 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-03-10 23:51:01,783 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 28 [2021-03-10 23:51:01,794 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:01,912 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:51:01,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:01,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:01,924 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:44 [2021-03-10 23:51:02,142 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-10 23:51:02,587 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-03-10 23:51:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:02,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:51:02,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 23:51:02,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144332674] [2021-03-10 23:51:02,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:51:02,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:51:02,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:51:02,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:51:02,777 INFO L87 Difference]: Start difference. First operand 3647 states and 11975 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:03,164 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-10 23:51:03,814 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-10 23:51:03,999 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:51:04,578 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:51:05,007 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-10 23:51:05,602 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:51:05,978 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:51:06,703 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2021-03-10 23:51:07,814 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-03-10 23:51:08,156 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:51:08,410 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-03-10 23:51:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:51:08,586 INFO L93 Difference]: Finished difference Result 5002 states and 16227 transitions. [2021-03-10 23:51:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:51:08,592 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:51:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:51:08,599 INFO L225 Difference]: With dead ends: 5002 [2021-03-10 23:51:08,599 INFO L226 Difference]: Without dead ends: 4977 [2021-03-10 23:51:08,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 6241.9ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:51:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2021-03-10 23:51:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 3628. [2021-03-10 23:51:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 3.2850840915357042) internal successors, (11915), 3627 states have internal predecessors, (11915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 11915 transitions. [2021-03-10 23:51:08,646 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 11915 transitions. Word has length 30 [2021-03-10 23:51:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:51:08,646 INFO L480 AbstractCegarLoop]: Abstraction has 3628 states and 11915 transitions. [2021-03-10 23:51:08,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 11915 transitions. [2021-03-10 23:51:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:51:08,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:51:08,650 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:51:08,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:51:08,851 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:51:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:51:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash -370273461, now seen corresponding path program 59 times [2021-03-10 23:51:08,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:51:08,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962483217] [2021-03-10 23:51:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:51:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:51:09,087 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-03-10 23:51:09,239 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-10 23:51:09,648 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 23:51:09,938 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-03-10 23:51:10,153 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2021-03-10 23:51:10,416 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:51:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:10,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962483217] [2021-03-10 23:51:10,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122566975] [2021-03-10 23:51:10,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:51:10,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:51:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:51:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:51:10,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:51:12,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:12,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:51:12,130 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 31 treesize of output 23 [2021-03-10 23:51:12,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:12,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:12,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:51:12,186 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 12 treesize of output 3 [2021-03-10 23:51:12,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:12,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:12,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:12,228 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:51:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:12,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:51:12,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-03-10 23:51:12,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187234246] [2021-03-10 23:51:12,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:51:12,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:51:12,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:51:12,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:51:12,426 INFO L87 Difference]: Start difference. First operand 3628 states and 11915 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:12,840 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 23:51:13,223 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:51:13,984 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-10 23:51:15,420 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-03-10 23:51:15,646 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-10 23:51:16,104 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:51:16,867 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 23:51:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:51:17,651 INFO L93 Difference]: Finished difference Result 3970 states and 12896 transitions. [2021-03-10 23:51:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:51:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:51:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:51:17,663 INFO L225 Difference]: With dead ends: 3970 [2021-03-10 23:51:17,663 INFO L226 Difference]: Without dead ends: 3951 [2021-03-10 23:51:17,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 4144.8ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:51:17,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-03-10 23:51:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3616. [2021-03-10 23:51:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3615 states have (on average 3.2876901798063622) internal successors, (11885), 3615 states have internal predecessors, (11885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 11885 transitions. [2021-03-10 23:51:17,706 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 11885 transitions. Word has length 30 [2021-03-10 23:51:17,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:51:17,706 INFO L480 AbstractCegarLoop]: Abstraction has 3616 states and 11885 transitions. [2021-03-10 23:51:17,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:17,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 11885 transitions. [2021-03-10 23:51:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:51:17,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:51:17,710 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:51:17,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-03-10 23:51:17,910 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:51:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:51:17,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1428729867, now seen corresponding path program 60 times [2021-03-10 23:51:17,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:51:17,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942235585] [2021-03-10 23:51:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:51:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:51:18,203 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:18,361 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:18,495 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:51:18,789 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:51:19,102 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:51:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:19,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942235585] [2021-03-10 23:51:19,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915539419] [2021-03-10 23:51:19,450 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 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 [2021-03-10 23:51:19,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 23:51:19,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:51:19,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:51:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:51:20,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:20,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:20,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-03-10 23:51:20,798 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:51:20,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:20,859 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 [2021-03-10 23:51:20,872 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-03-10 23:51:20,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:20,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:20,931 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:15 [2021-03-10 23:51:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:21,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:51:21,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 23:51:21,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319254431] [2021-03-10 23:51:21,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:51:21,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:51:21,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:51:21,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:51:21,270 INFO L87 Difference]: Start difference. First operand 3616 states and 11885 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:21,878 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:51:22,084 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 19 [2021-03-10 23:51:22,461 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:51:22,670 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:23,368 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 23:51:23,969 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 23:51:24,344 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 23:51:24,987 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 23:51:26,094 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:51:26,437 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-03-10 23:51:26,740 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:51:27,021 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:51:27,609 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:51:27,859 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:51:28,433 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:51:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:51:29,126 INFO L93 Difference]: Finished difference Result 5066 states and 16356 transitions. [2021-03-10 23:51:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:51:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:51:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:51:29,140 INFO L225 Difference]: With dead ends: 5066 [2021-03-10 23:51:29,140 INFO L226 Difference]: Without dead ends: 5012 [2021-03-10 23:51:29,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 7098.6ms TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:51:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2021-03-10 23:51:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 3604. [2021-03-10 23:51:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 3.286983069664169) internal successors, (11843), 3603 states have internal predecessors, (11843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 11843 transitions. [2021-03-10 23:51:29,188 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 11843 transitions. Word has length 30 [2021-03-10 23:51:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:51:29,188 INFO L480 AbstractCegarLoop]: Abstraction has 3604 states and 11843 transitions. [2021-03-10 23:51:29,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 11843 transitions. [2021-03-10 23:51:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:51:29,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:51:29,209 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:51:29,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:51:29,409 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:51:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:51:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash 714126979, now seen corresponding path program 61 times [2021-03-10 23:51:29,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:51:29,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937172613] [2021-03-10 23:51:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:51:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:51:29,730 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:29,901 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:30,038 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:51:30,418 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:51:30,759 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:51:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:31,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937172613] [2021-03-10 23:51:31,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761426382] [2021-03-10 23:51:31,184 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 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 [2021-03-10 23:51:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:51:31,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:51:31,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:51:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:32,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:51:32,910 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 31 treesize of output 23 [2021-03-10 23:51:32,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:32,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:32,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:51:32,962 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 12 treesize of output 3 [2021-03-10 23:51:32,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:32,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:32,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:32,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:51:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:33,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:51:33,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-03-10 23:51:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237465794] [2021-03-10 23:51:33,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:51:33,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:51:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:51:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:51:33,179 INFO L87 Difference]: Start difference. First operand 3604 states and 11843 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) [2021-03-10 23:51:33,815 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:51:34,026 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:51:34,394 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:51:34,615 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:35,225 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 23:51:35,781 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-03-10 23:51:36,060 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:51:36,726 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:51:37,415 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 23:51:37,716 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 23:51:38,573 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:51:39,010 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 23:51:39,396 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:51:40,119 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:51:40,714 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:51:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:51:41,794 INFO L93 Difference]: Finished difference Result 5237 states and 16944 transitions. [2021-03-10 23:51:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:51:41,800 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 [2021-03-10 23:51:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:51:41,808 INFO L225 Difference]: With dead ends: 5237 [2021-03-10 23:51:41,808 INFO L226 Difference]: Without dead ends: 5216 [2021-03-10 23:51:41,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 7926.5ms TimeCoverageRelationStatistics Valid=440, Invalid=1912, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:51:41,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2021-03-10 23:51:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 3678. [2021-03-10 23:51:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 3.2882784878977427) internal successors, (12091), 3677 states have internal predecessors, (12091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 12091 transitions. [2021-03-10 23:51:41,855 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 12091 transitions. Word has length 30 [2021-03-10 23:51:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:51:41,855 INFO L480 AbstractCegarLoop]: Abstraction has 3678 states and 12091 transitions. [2021-03-10 23:51:41,855 INFO L481 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) [2021-03-10 23:51:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 12091 transitions. [2021-03-10 23:51:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:51:41,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:51:41,859 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:51:42,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-03-10 23:51:42,060 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:51:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:51:42,060 INFO L82 PathProgramCache]: Analyzing trace with hash -832540021, now seen corresponding path program 62 times [2021-03-10 23:51:42,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:51:42,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64005838] [2021-03-10 23:51:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:51:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:51:42,357 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:42,521 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:42,658 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:51:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:43,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64005838] [2021-03-10 23:51:43,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007392656] [2021-03-10 23:51:43,298 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 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 [2021-03-10 23:51:43,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:51:43,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:51:43,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:51:43,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:51:44,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:44,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:51:44,930 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 31 treesize of output 23 [2021-03-10 23:51:44,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:44,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:44,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:51:44,981 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 12 treesize of output 3 [2021-03-10 23:51:44,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 23:51:45,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:51:45,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:51:45,020 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-03-10 23:51:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:45,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:51:45,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-03-10 23:51:45,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795035267] [2021-03-10 23:51:45,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:51:45,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:51:45,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:51:45,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:51:45,213 INFO L87 Difference]: Start difference. First operand 3678 states and 12091 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) [2021-03-10 23:51:45,938 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:51:46,183 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-03-10 23:51:46,855 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:47,640 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-10 23:51:48,551 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:51:49,564 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-10 23:51:49,859 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 23:51:50,720 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:51:53,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:51:53,353 INFO L93 Difference]: Finished difference Result 5168 states and 16783 transitions. [2021-03-10 23:51:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:51:53,360 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 [2021-03-10 23:51:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:51:53,368 INFO L225 Difference]: With dead ends: 5168 [2021-03-10 23:51:53,368 INFO L226 Difference]: Without dead ends: 5143 [2021-03-10 23:51:53,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 5700.1ms TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:51:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5143 states. [2021-03-10 23:51:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5143 to 3711. [2021-03-10 23:51:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3711 states, 3710 states have (on average 3.2878706199460916) internal successors, (12198), 3710 states have internal predecessors, (12198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:51:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3711 states to 3711 states and 12198 transitions. [2021-03-10 23:51:53,416 INFO L78 Accepts]: Start accepts. Automaton has 3711 states and 12198 transitions. Word has length 30 [2021-03-10 23:51:53,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:51:53,416 INFO L480 AbstractCegarLoop]: Abstraction has 3711 states and 12198 transitions. [2021-03-10 23:51:53,416 INFO L481 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) [2021-03-10 23:51:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3711 states and 12198 transitions. [2021-03-10 23:51:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:51:53,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:51:53,420 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:51:53,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:51:53,637 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:51:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:51:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash 179663627, now seen corresponding path program 63 times [2021-03-10 23:51:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:51:53,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913945574] [2021-03-10 23:51:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:51:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:51:53,935 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:54,099 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-10 23:51:54,263 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:51:54,448 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-10 23:51:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:51:54,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913945574] [2021-03-10 23:51:54,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219571000] [2021-03-10 23:51:54,853 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 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 [2021-03-10 23:51:54,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:51:54,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:51:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 23:51:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-03-10 23:51:56,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:51:56,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:51:56,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-03-10 23:51:56,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-03-10 23:51:56,887 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:51:56,891 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:51:56,891 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:51:56 BasicIcfg [2021-03-10 23:51:56,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:51:56,891 INFO L168 Benchmark]: Toolchain (without parser) took 848439.57 ms. Allocated memory was 255.9 MB in the beginning and 645.9 MB in the end (delta: 390.1 MB). Free memory was 236.7 MB in the beginning and 303.6 MB in the end (delta: -66.9 MB). Peak memory consumption was 323.5 MB. Max. memory is 16.0 GB. [2021-03-10 23:51:56,891 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:51:56,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.12 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:51:56,891 INFO L168 Benchmark]: Boogie Preprocessor took 9.77 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 961.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:51:56,891 INFO L168 Benchmark]: RCFGBuilder took 243.06 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 238.3 MB in the end (delta: -4.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-10 23:51:56,891 INFO L168 Benchmark]: TraceAbstraction took 848163.91 ms. Allocated memory was 255.9 MB in the beginning and 645.9 MB in the end (delta: 390.1 MB). Free memory was 238.3 MB in the beginning and 303.6 MB in the end (delta: -65.2 MB). Peak memory consumption was 324.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:51:56,892 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.12 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.77 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 961.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 243.06 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 238.3 MB in the end (delta: -4.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 848163.91 ms. Allocated memory was 255.9 MB in the beginning and 645.9 MB in the end (delta: 390.1 MB). Free memory was 238.3 MB in the beginning and 303.6 MB in the end (delta: -65.2 MB). Peak memory consumption was 324.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 60). Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 848063.3ms, OverallIterations: 128, TraceHistogramMax: 2, EmptinessCheckTime: 427.8ms, AutomataDifference: 635749.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6198 SDtfs, 34735 SDslu, 59959 SDs, 0 SdLazy, 128766 SolverSat, 9958 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87963.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8746 GetRequests, 2604 SyntacticMatches, 191 SemanticMatches, 5951 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105395 ImplicationChecksByTransitivity, 539474.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3757occurred in iteration=105, InterpolantAutomatonStates: 4575, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4999.9ms AutomataMinimizationTime, 127 MinimizatonAttempts, 180519 StatesRemovedByMinimization, 127 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 405.3ms SsaConstructionTime, 1241.6ms SatisfiabilityAnalysisTime, 174518.4ms InterpolantComputationTime, 7236 NumberOfCodeBlocks, 7236 NumberOfCodeBlocksAsserted, 401 NumberOfCheckSat, 6985 ConstructedInterpolants, 222 QuantifiedInterpolants, 128358 SizeOfPredicates, 868 NumberOfNonLiveVariables, 7964 ConjunctsInSsa, 2409 ConjunctsInUnsatCore, 251 InterpolantComputations, 3 PerfectInterpolantSequences, 135/1758 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown